81231280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2111}}^1$

素因数の和:2174

約数の個数: 80

約数和(自身を含む): 208986624

約数和(自身を除く): 127755344

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 52, 65, 74, 80, 104, 130, 148, 185, 208, 260, 296, 370, 481, 520, 592, 740, 962, 1040, 1480, 1924, 2111, 2405, 2960, 3848, 4222, 4810, 7696, 8444, 9620, 10555, 16888, 19240, 21110, 27443, 33776, 38480, 42220, 54886, 78107, 84440, 109772, 137215, 156214, 168880, 219544, 274430, 312428, 390535, 439088, 548860, 624856, 781070, 1015391, 1097720, 1249712, 1562140, 2030782, 2195440, 3124280, 4061564, 5076955, 6248560, 8123128, 10153910, 16246256, 20307820, 40615640, 81231280]

約数ペア:

[(1, 81231280), (2, 40615640), (4, 20307820), (5, 16246256), (8, 10153910), (10, 8123128), (13, 6248560), (16, 5076955), (20, 4061564), (26, 3124280), (37, 2195440), (40, 2030782), (52, 1562140), (65, 1249712), (74, 1097720), (80, 1015391), (104, 781070), (130, 624856), (148, 548860), (185, 439088), (208, 390535), (260, 312428), (296, 274430), (370, 219544), (481, 168880), (520, 156214), (592, 137215), (740, 109772), (962, 84440), (1040, 78107), (1480, 54886), (1924, 42220), (2111, 38480), (2405, 33776), (2960, 27443), (3848, 21110), (4222, 19240), (4810, 16888), (7696, 10555), (8444, 9620)]