20458440

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{997}}^1$

素因数の和:1036

約数の個数: 128

約数和(自身を含む): 71856000

約数和(自身を除く): 51397560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 27, 30, 36, 38, 40, 45, 54, 57, 60, 72, 76, 90, 95, 108, 114, 120, 135, 152, 171, 180, 190, 216, 228, 270, 285, 342, 360, 380, 456, 513, 540, 570, 684, 760, 855, 997, 1026, 1080, 1140, 1368, 1710, 1994, 2052, 2280, 2565, 2991, 3420, 3988, 4104, 4985, 5130, 5982, 6840, 7976, 8973, 9970, 10260, 11964, 14955, 17946, 18943, 19940, 20520, 23928, 26919, 29910, 35892, 37886, 39880, 44865, 53838, 56829, 59820, 71784, 75772, 89730, 94715, 107676, 113658, 119640, 134595, 151544, 170487, 179460, 189430, 215352, 227316, 269190, 284145, 340974, 358920, 378860, 454632, 511461, 538380, 568290, 681948, 757720, 852435, 1022922, 1076760, 1136580, 1363896, 1704870, 2045844, 2273160, 2557305, 3409740, 4091688, 5114610, 6819480, 10229220, 20458440]

約数ペア:

[(1, 20458440), (2, 10229220), (3, 6819480), (4, 5114610), (5, 4091688), (6, 3409740), (8, 2557305), (9, 2273160), (10, 2045844), (12, 1704870), (15, 1363896), (18, 1136580), (19, 1076760), (20, 1022922), (24, 852435), (27, 757720), (30, 681948), (36, 568290), (38, 538380), (40, 511461), (45, 454632), (54, 378860), (57, 358920), (60, 340974), (72, 284145), (76, 269190), (90, 227316), (95, 215352), (108, 189430), (114, 179460), (120, 170487), (135, 151544), (152, 134595), (171, 119640), (180, 113658), (190, 107676), (216, 94715), (228, 89730), (270, 75772), (285, 71784), (342, 59820), (360, 56829), (380, 53838), (456, 44865), (513, 39880), (540, 37886), (570, 35892), (684, 29910), (760, 26919), (855, 23928), (997, 20520), (1026, 19940), (1080, 18943), (1140, 17946), (1368, 14955), (1710, 11964), (1994, 10260), (2052, 9970), (2280, 8973), (2565, 7976), (2991, 6840), (3420, 5982), (3988, 5130), (4104, 4985)]