20965620

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{26879}}^1$

素因数の和:26904

約数の個数: 48

約数和(自身を含む): 63221760

約数和(自身を除く): 42256140

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 26879, 53758, 80637, 107516, 134395, 161274, 268790, 322548, 349427, 403185, 537580, 698854, 806370, 1048281, 1397708, 1612740, 1747135, 2096562, 3494270, 4193124, 5241405, 6988540, 10482810, 20965620]

約数ペア:

[(1, 20965620), (2, 10482810), (3, 6988540), (4, 5241405), (5, 4193124), (6, 3494270), (10, 2096562), (12, 1747135), (13, 1612740), (15, 1397708), (20, 1048281), (26, 806370), (30, 698854), (39, 537580), (52, 403185), (60, 349427), (65, 322548), (78, 268790), (130, 161274), (156, 134395), (195, 107516), (260, 80637), (390, 53758), (780, 26879)]