20671664

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 46872000

約数和(自身を除く): 26200336

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 29, 46, 52, 58, 92, 104, 116, 149, 184, 208, 232, 298, 299, 368, 377, 464, 596, 598, 667, 754, 1192, 1196, 1334, 1508, 1937, 2384, 2392, 2668, 3016, 3427, 3874, 4321, 4784, 5336, 6032, 6854, 7748, 8642, 8671, 10672, 13708, 15496, 17284, 17342, 27416, 30992, 34568, 34684, 44551, 54832, 56173, 69136, 69368, 89102, 99383, 112346, 138736, 178204, 198766, 224692, 356408, 397532, 449384, 712816, 795064, 898768, 1291979, 1590128, 2583958, 5167916, 10335832, 20671664]

約数ペア:

[(1, 20671664), (2, 10335832), (4, 5167916), (8, 2583958), (13, 1590128), (16, 1291979), (23, 898768), (26, 795064), (29, 712816), (46, 449384), (52, 397532), (58, 356408), (92, 224692), (104, 198766), (116, 178204), (149, 138736), (184, 112346), (208, 99383), (232, 89102), (298, 69368), (299, 69136), (368, 56173), (377, 54832), (464, 44551), (596, 34684), (598, 34568), (667, 30992), (754, 27416), (1192, 17342), (1196, 17284), (1334, 15496), (1508, 13708), (1937, 10672), (2384, 8671), (2392, 8642), (2668, 7748), (3016, 6854), (3427, 6032), (3874, 5336), (4321, 4784)]