21038940

素因数分解:

$2^2\times 3^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1$

素因数の和:80

約数の個数: 192

約数和(自身を含む): 73288320

約数和(自身を除く): 52249380

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 27, 30, 36, 37, 39, 45, 52, 54, 60, 65, 74, 78, 81, 90, 108, 111, 117, 130, 135, 148, 156, 162, 180, 185, 195, 222, 234, 243, 260, 270, 324, 333, 351, 370, 390, 405, 444, 468, 481, 486, 540, 555, 585, 666, 702, 729, 740, 780, 810, 962, 972, 999, 1053, 1110, 1170, 1215, 1332, 1404, 1443, 1458, 1620, 1665, 1755, 1924, 1998, 2106, 2187, 2220, 2340, 2405, 2430, 2886, 2916, 2997, 3159, 3330, 3510, 3645, 3996, 4212, 4329, 4374, 4810, 4860, 4995, 5265, 5772, 5994, 6318, 6660, 7020, 7215, 7290, 8658, 8748, 8991, 9477, 9620, 9990, 10530, 10935, 11988, 12636, 12987, 14430, 14580, 14985, 15795, 17316, 17982, 18954, 19980, 21060, 21645, 21870, 25974, 26973, 28431, 28860, 29970, 31590, 35964, 37908, 38961, 43290, 43740, 44955, 47385, 51948, 53946, 56862, 59940, 63180, 64935, 77922, 80919, 86580, 89910, 94770, 107892, 113724, 116883, 129870, 134865, 142155, 155844, 161838, 179820, 189540, 194805, 233766, 259740, 269730, 284310, 323676, 350649, 389610, 404595, 467532, 539460, 568620, 584415, 701298, 779220, 809190, 1051947, 1168830, 1402596, 1618380, 1753245, 2103894, 2337660, 3506490, 4207788, 5259735, 7012980, 10519470, 21038940]

約数ペア:

[(1, 21038940), (2, 10519470), (3, 7012980), (4, 5259735), (5, 4207788), (6, 3506490), (9, 2337660), (10, 2103894), (12, 1753245), (13, 1618380), (15, 1402596), (18, 1168830), (20, 1051947), (26, 809190), (27, 779220), (30, 701298), (36, 584415), (37, 568620), (39, 539460), (45, 467532), (52, 404595), (54, 389610), (60, 350649), (65, 323676), (74, 284310), (78, 269730), (81, 259740), (90, 233766), (108, 194805), (111, 189540), (117, 179820), (130, 161838), (135, 155844), (148, 142155), (156, 134865), (162, 129870), (180, 116883), (185, 113724), (195, 107892), (222, 94770), (234, 89910), (243, 86580), (260, 80919), (270, 77922), (324, 64935), (333, 63180), (351, 59940), (370, 56862), (390, 53946), (405, 51948), (444, 47385), (468, 44955), (481, 43740), (486, 43290), (540, 38961), (555, 37908), (585, 35964), (666, 31590), (702, 29970), (729, 28860), (740, 28431), (780, 26973), (810, 25974), (962, 21870), (972, 21645), (999, 21060), (1053, 19980), (1110, 18954), (1170, 17982), (1215, 17316), (1332, 15795), (1404, 14985), (1443, 14580), (1458, 14430), (1620, 12987), (1665, 12636), (1755, 11988), (1924, 10935), (1998, 10530), (2106, 9990), (2187, 9620), (2220, 9477), (2340, 8991), (2405, 8748), (2430, 8658), (2886, 7290), (2916, 7215), (2997, 7020), (3159, 6660), (3330, 6318), (3510, 5994), (3645, 5772), (3996, 5265), (4212, 4995), (4329, 4860), (4374, 4810)]