81280360

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{877}}^1$

素因数の和:1226

約数の個数: 64

約数和(自身を含む): 209877120

約数和(自身を除く): 128596760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 331, 662, 877, 1324, 1655, 1754, 2317, 2648, 3310, 3508, 4385, 4634, 6139, 6620, 7016, 8770, 9268, 11585, 12278, 13240, 17540, 18536, 23170, 24556, 30695, 35080, 46340, 49112, 61390, 92680, 122780, 245560, 290287, 580574, 1161148, 1451435, 2032009, 2322296, 2902870, 4064018, 5805740, 8128036, 10160045, 11611480, 16256072, 20320090, 40640180, 81280360]

約数ペア:

[(1, 81280360), (2, 40640180), (4, 20320090), (5, 16256072), (7, 11611480), (8, 10160045), (10, 8128036), (14, 5805740), (20, 4064018), (28, 2902870), (35, 2322296), (40, 2032009), (56, 1451435), (70, 1161148), (140, 580574), (280, 290287), (331, 245560), (662, 122780), (877, 92680), (1324, 61390), (1655, 49112), (1754, 46340), (2317, 35080), (2648, 30695), (3310, 24556), (3508, 23170), (4385, 18536), (4634, 17540), (6139, 13240), (6620, 12278), (7016, 11585), (8770, 9268)]