257456420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{283}}^1\times {\mathrm{3499}}^1$

素因数の和:3804

約数の個数: 48

約数和(自身を含む): 584472000

約数和(自身を除く): 327015580

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 283, 566, 1132, 1415, 2830, 3499, 3679, 5660, 6998, 7358, 13996, 14716, 17495, 18395, 34990, 36790, 45487, 69980, 73580, 90974, 181948, 227435, 454870, 909740, 990217, 1980434, 3960868, 4951085, 9902170, 12872821, 19804340, 25745642, 51491284, 64364105, 128728210, 257456420]

約数ペア:

[(1, 257456420), (2, 128728210), (4, 64364105), (5, 51491284), (10, 25745642), (13, 19804340), (20, 12872821), (26, 9902170), (52, 4951085), (65, 3960868), (130, 1980434), (260, 990217), (283, 909740), (566, 454870), (1132, 227435), (1415, 181948), (2830, 90974), (3499, 73580), (3679, 69980), (5660, 45487), (6998, 36790), (7358, 34990), (13996, 18395), (14716, 17495)]