81399760

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1$

素因数の和:173

約数の個数: 160

約数和(自身を含む): 220485888

約数和(自身を除く): 139086128

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 23, 26, 40, 41, 46, 52, 65, 80, 82, 83, 92, 104, 115, 130, 164, 166, 184, 205, 208, 230, 260, 299, 328, 332, 368, 410, 415, 460, 520, 533, 598, 656, 664, 820, 830, 920, 943, 1040, 1066, 1079, 1196, 1328, 1495, 1640, 1660, 1840, 1886, 1909, 2132, 2158, 2392, 2665, 2990, 3280, 3320, 3403, 3772, 3818, 4264, 4316, 4715, 4784, 5330, 5395, 5980, 6640, 6806, 7544, 7636, 8528, 8632, 9430, 9545, 10660, 10790, 11960, 12259, 13612, 15088, 15272, 17015, 17264, 18860, 19090, 21320, 21580, 23920, 24518, 24817, 27224, 30544, 34030, 37720, 38180, 42640, 43160, 44239, 49036, 49634, 54448, 61295, 68060, 75440, 76360, 78269, 86320, 88478, 98072, 99268, 122590, 124085, 136120, 152720, 156538, 176956, 196144, 198536, 221195, 245180, 248170, 272240, 313076, 353912, 391345, 397072, 442390, 490360, 496340, 626152, 707824, 782690, 884780, 980720, 992680, 1017497, 1252304, 1565380, 1769560, 1985360, 2034994, 3130760, 3539120, 4069988, 5087485, 6261520, 8139976, 10174970, 16279952, 20349940, 40699880, 81399760]

約数ペア:

[(1, 81399760), (2, 40699880), (4, 20349940), (5, 16279952), (8, 10174970), (10, 8139976), (13, 6261520), (16, 5087485), (20, 4069988), (23, 3539120), (26, 3130760), (40, 2034994), (41, 1985360), (46, 1769560), (52, 1565380), (65, 1252304), (80, 1017497), (82, 992680), (83, 980720), (92, 884780), (104, 782690), (115, 707824), (130, 626152), (164, 496340), (166, 490360), (184, 442390), (205, 397072), (208, 391345), (230, 353912), (260, 313076), (299, 272240), (328, 248170), (332, 245180), (368, 221195), (410, 198536), (415, 196144), (460, 176956), (520, 156538), (533, 152720), (598, 136120), (656, 124085), (664, 122590), (820, 99268), (830, 98072), (920, 88478), (943, 86320), (1040, 78269), (1066, 76360), (1079, 75440), (1196, 68060), (1328, 61295), (1495, 54448), (1640, 49634), (1660, 49036), (1840, 44239), (1886, 43160), (1909, 42640), (2132, 38180), (2158, 37720), (2392, 34030), (2665, 30544), (2990, 27224), (3280, 24817), (3320, 24518), (3403, 23920), (3772, 21580), (3818, 21320), (4264, 19090), (4316, 18860), (4715, 17264), (4784, 17015), (5330, 15272), (5395, 15088), (5980, 13612), (6640, 12259), (6806, 11960), (7544, 10790), (7636, 10660), (8528, 9545), (8632, 9430)]