21749910

素因数分解:

$2^1\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{257}}^1$

素因数の和:318

約数の個数: 128

約数和(自身を含む): 66576384

約数和(自身を除く): 44826474

約数列:

[1, 2, 3, 5, 6, 7, 10, 13, 14, 15, 21, 26, 30, 31, 35, 39, 42, 62, 65, 70, 78, 91, 93, 105, 130, 155, 182, 186, 195, 210, 217, 257, 273, 310, 390, 403, 434, 455, 465, 514, 546, 651, 771, 806, 910, 930, 1085, 1209, 1285, 1302, 1365, 1542, 1799, 2015, 2170, 2418, 2570, 2730, 2821, 3255, 3341, 3598, 3855, 4030, 5397, 5642, 6045, 6510, 6682, 7710, 7967, 8463, 8995, 10023, 10794, 12090, 14105, 15934, 16705, 16926, 17990, 20046, 23387, 23901, 26985, 28210, 33410, 39835, 42315, 46774, 47802, 50115, 53970, 55769, 70161, 79670, 84630, 100230, 103571, 111538, 116935, 119505, 140322, 167307, 207142, 233870, 239010, 278845, 310713, 334614, 350805, 517855, 557690, 621426, 701610, 724997, 836535, 1035710, 1449994, 1553565, 1673070, 2174991, 3107130, 3624985, 4349982, 7249970, 10874955, 21749910]

約数ペア:

[(1, 21749910), (2, 10874955), (3, 7249970), (5, 4349982), (6, 3624985), (7, 3107130), (10, 2174991), (13, 1673070), (14, 1553565), (15, 1449994), (21, 1035710), (26, 836535), (30, 724997), (31, 701610), (35, 621426), (39, 557690), (42, 517855), (62, 350805), (65, 334614), (70, 310713), (78, 278845), (91, 239010), (93, 233870), (105, 207142), (130, 167307), (155, 140322), (182, 119505), (186, 116935), (195, 111538), (210, 103571), (217, 100230), (257, 84630), (273, 79670), (310, 70161), (390, 55769), (403, 53970), (434, 50115), (455, 47802), (465, 46774), (514, 42315), (546, 39835), (651, 33410), (771, 28210), (806, 26985), (910, 23901), (930, 23387), (1085, 20046), (1209, 17990), (1285, 16926), (1302, 16705), (1365, 15934), (1542, 14105), (1799, 12090), (2015, 10794), (2170, 10023), (2418, 8995), (2570, 8463), (2730, 7967), (2821, 7710), (3255, 6682), (3341, 6510), (3598, 6045), (3855, 5642), (4030, 5397)]