21128850

素因数分解:

$2^1\times 3^5\times 5^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:111

約数の個数: 144

約数和(自身を含む): 61746048

約数和(自身を除く): 40617198

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 27, 30, 37, 45, 47, 50, 54, 74, 75, 81, 90, 94, 111, 135, 141, 150, 162, 185, 222, 225, 235, 243, 270, 282, 333, 370, 405, 423, 450, 470, 486, 555, 666, 675, 705, 810, 846, 925, 999, 1110, 1175, 1215, 1269, 1350, 1410, 1665, 1739, 1850, 1998, 2025, 2115, 2350, 2430, 2538, 2775, 2997, 3330, 3478, 3525, 3807, 4050, 4230, 4995, 5217, 5550, 5994, 6075, 6345, 7050, 7614, 8325, 8695, 8991, 9990, 10434, 10575, 11421, 12150, 12690, 14985, 15651, 16650, 17390, 17982, 19035, 21150, 22842, 24975, 26085, 29970, 31302, 31725, 38070, 43475, 44955, 46953, 49950, 52170, 57105, 63450, 74925, 78255, 86950, 89910, 93906, 95175, 114210, 130425, 140859, 149850, 156510, 190350, 224775, 234765, 260850, 281718, 285525, 391275, 422577, 449550, 469530, 571050, 704295, 782550, 845154, 1173825, 1408590, 2112885, 2347650, 3521475, 4225770, 7042950, 10564425, 21128850]

約数ペア:

[(1, 21128850), (2, 10564425), (3, 7042950), (5, 4225770), (6, 3521475), (9, 2347650), (10, 2112885), (15, 1408590), (18, 1173825), (25, 845154), (27, 782550), (30, 704295), (37, 571050), (45, 469530), (47, 449550), (50, 422577), (54, 391275), (74, 285525), (75, 281718), (81, 260850), (90, 234765), (94, 224775), (111, 190350), (135, 156510), (141, 149850), (150, 140859), (162, 130425), (185, 114210), (222, 95175), (225, 93906), (235, 89910), (243, 86950), (270, 78255), (282, 74925), (333, 63450), (370, 57105), (405, 52170), (423, 49950), (450, 46953), (470, 44955), (486, 43475), (555, 38070), (666, 31725), (675, 31302), (705, 29970), (810, 26085), (846, 24975), (925, 22842), (999, 21150), (1110, 19035), (1175, 17982), (1215, 17390), (1269, 16650), (1350, 15651), (1410, 14985), (1665, 12690), (1739, 12150), (1850, 11421), (1998, 10575), (2025, 10434), (2115, 9990), (2350, 8991), (2430, 8695), (2538, 8325), (2775, 7614), (2997, 7050), (3330, 6345), (3478, 6075), (3525, 5994), (3807, 5550), (4050, 5217), (4230, 4995)]