81427440

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{691}}^1$

素因数の和:1198

約数の個数: 80

約数和(自身を含む): 253305216

約数和(自身を除く): 171877776

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 491, 691, 982, 1382, 1473, 1964, 2073, 2455, 2764, 2946, 3455, 3928, 4146, 4910, 5528, 5892, 6910, 7365, 7856, 8292, 9820, 10365, 11056, 11784, 13820, 14730, 16584, 19640, 20730, 23568, 27640, 29460, 33168, 39280, 41460, 55280, 58920, 82920, 117840, 165840, 339281, 678562, 1017843, 1357124, 1696405, 2035686, 2714248, 3392810, 4071372, 5089215, 5428496, 6785620, 8142744, 10178430, 13571240, 16285488, 20356860, 27142480, 40713720, 81427440]

約数ペア:

[(1, 81427440), (2, 40713720), (3, 27142480), (4, 20356860), (5, 16285488), (6, 13571240), (8, 10178430), (10, 8142744), (12, 6785620), (15, 5428496), (16, 5089215), (20, 4071372), (24, 3392810), (30, 2714248), (40, 2035686), (48, 1696405), (60, 1357124), (80, 1017843), (120, 678562), (240, 339281), (491, 165840), (691, 117840), (982, 82920), (1382, 58920), (1473, 55280), (1964, 41460), (2073, 39280), (2455, 33168), (2764, 29460), (2946, 27640), (3455, 23568), (3928, 20730), (4146, 19640), (4910, 16584), (5528, 14730), (5892, 13820), (6910, 11784), (7365, 11056), (7856, 10365), (8292, 9820)]