661531140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1399}}^1$

素因数の和:1522

約数の個数: 144

約数和(自身を含む): 2091398400

約数和(自身を除く): 1429867260

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 71, 74, 90, 111, 142, 148, 180, 185, 213, 222, 284, 333, 355, 370, 426, 444, 555, 639, 666, 710, 740, 852, 1065, 1110, 1278, 1332, 1399, 1420, 1665, 2130, 2220, 2556, 2627, 2798, 3195, 3330, 4197, 4260, 5254, 5596, 6390, 6660, 6995, 7881, 8394, 10508, 12591, 12780, 13135, 13990, 15762, 16788, 20985, 23643, 25182, 26270, 27980, 31524, 39405, 41970, 47286, 50364, 51763, 52540, 62955, 78810, 83940, 94572, 99329, 103526, 118215, 125910, 155289, 157620, 198658, 207052, 236430, 251820, 258815, 297987, 310578, 397316, 465867, 472860, 496645, 517630, 595974, 621156, 776445, 893961, 931734, 993290, 1035260, 1191948, 1489935, 1552890, 1787922, 1863468, 1986580, 2329335, 2979870, 3105780, 3575844, 3675173, 4469805, 4658670, 5959740, 7350346, 8939610, 9317340, 11025519, 14700692, 17879220, 18375865, 22051038, 33076557, 36751730, 44102076, 55127595, 66153114, 73503460, 110255190, 132306228, 165382785, 220510380, 330765570, 661531140]

約数ペア:

[(1, 661531140), (2, 330765570), (3, 220510380), (4, 165382785), (5, 132306228), (6, 110255190), (9, 73503460), (10, 66153114), (12, 55127595), (15, 44102076), (18, 36751730), (20, 33076557), (30, 22051038), (36, 18375865), (37, 17879220), (45, 14700692), (60, 11025519), (71, 9317340), (74, 8939610), (90, 7350346), (111, 5959740), (142, 4658670), (148, 4469805), (180, 3675173), (185, 3575844), (213, 3105780), (222, 2979870), (284, 2329335), (333, 1986580), (355, 1863468), (370, 1787922), (426, 1552890), (444, 1489935), (555, 1191948), (639, 1035260), (666, 993290), (710, 931734), (740, 893961), (852, 776445), (1065, 621156), (1110, 595974), (1278, 517630), (1332, 496645), (1399, 472860), (1420, 465867), (1665, 397316), (2130, 310578), (2220, 297987), (2556, 258815), (2627, 251820), (2798, 236430), (3195, 207052), (3330, 198658), (4197, 157620), (4260, 155289), (5254, 125910), (5596, 118215), (6390, 103526), (6660, 99329), (6995, 94572), (7881, 83940), (8394, 78810), (10508, 62955), (12591, 52540), (12780, 51763), (13135, 50364), (13990, 47286), (15762, 41970), (16788, 39405), (20985, 31524), (23643, 27980), (25182, 26270)]