20802860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:171

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 30000340

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 31, 52, 58, 62, 65, 89, 116, 124, 130, 145, 155, 178, 260, 290, 310, 356, 377, 403, 445, 580, 620, 754, 806, 890, 899, 1157, 1508, 1612, 1780, 1798, 1885, 2015, 2314, 2581, 2759, 3596, 3770, 4030, 4495, 4628, 5162, 5518, 5785, 7540, 8060, 8990, 10324, 11036, 11570, 11687, 12905, 13795, 17980, 23140, 23374, 25810, 27590, 33553, 35867, 46748, 51620, 55180, 58435, 67106, 71734, 80011, 116870, 134212, 143468, 160022, 167765, 179335, 233740, 320044, 335530, 358670, 400055, 671060, 717340, 800110, 1040143, 1600220, 2080286, 4160572, 5200715, 10401430, 20802860]

約数ペア:

[(1, 20802860), (2, 10401430), (4, 5200715), (5, 4160572), (10, 2080286), (13, 1600220), (20, 1040143), (26, 800110), (29, 717340), (31, 671060), (52, 400055), (58, 358670), (62, 335530), (65, 320044), (89, 233740), (116, 179335), (124, 167765), (130, 160022), (145, 143468), (155, 134212), (178, 116870), (260, 80011), (290, 71734), (310, 67106), (356, 58435), (377, 55180), (403, 51620), (445, 46748), (580, 35867), (620, 33553), (754, 27590), (806, 25810), (890, 23374), (899, 23140), (1157, 17980), (1508, 13795), (1612, 12905), (1780, 11687), (1798, 11570), (1885, 11036), (2015, 10324), (2314, 8990), (2581, 8060), (2759, 7540), (3596, 5785), (3770, 5518), (4030, 5162), (4495, 4628)]