81003440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1831}}^1$

素因数の和:1930

約数の個数: 80

約数和(自身を含む): 218081280

約数和(自身を除く): 137077840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 79, 80, 112, 140, 158, 280, 316, 395, 553, 560, 632, 790, 1106, 1264, 1580, 1831, 2212, 2765, 3160, 3662, 4424, 5530, 6320, 7324, 8848, 9155, 11060, 12817, 14648, 18310, 22120, 25634, 29296, 36620, 44240, 51268, 64085, 73240, 102536, 128170, 144649, 146480, 205072, 256340, 289298, 512680, 578596, 723245, 1012543, 1025360, 1157192, 1446490, 2025086, 2314384, 2892980, 4050172, 5062715, 5785960, 8100344, 10125430, 11571920, 16200688, 20250860, 40501720, 81003440]

約数ペア:

[(1, 81003440), (2, 40501720), (4, 20250860), (5, 16200688), (7, 11571920), (8, 10125430), (10, 8100344), (14, 5785960), (16, 5062715), (20, 4050172), (28, 2892980), (35, 2314384), (40, 2025086), (56, 1446490), (70, 1157192), (79, 1025360), (80, 1012543), (112, 723245), (140, 578596), (158, 512680), (280, 289298), (316, 256340), (395, 205072), (553, 146480), (560, 144649), (632, 128170), (790, 102536), (1106, 73240), (1264, 64085), (1580, 51268), (1831, 44240), (2212, 36620), (2765, 29296), (3160, 25634), (3662, 22120), (4424, 18310), (5530, 14648), (6320, 12817), (7324, 11060), (8848, 9155)]