20453990

素因数分解:

$2^1\times 5^1\times {\mathrm{29}}^1\times {\mathrm{251}}^1\times {\mathrm{281}}^1$

素因数の和:568

約数の個数: 32

約数和(自身を含む): 38374560

約数和(自身を除く): 17920570

約数列:

[1, 2, 5, 10, 29, 58, 145, 251, 281, 290, 502, 562, 1255, 1405, 2510, 2810, 7279, 8149, 14558, 16298, 36395, 40745, 70531, 72790, 81490, 141062, 352655, 705310, 2045399, 4090798, 10226995, 20453990]

約数ペア:

[(1, 20453990), (2, 10226995), (5, 4090798), (10, 2045399), (29, 705310), (58, 352655), (145, 141062), (251, 81490), (281, 72790), (290, 70531), (502, 40745), (562, 36395), (1255, 16298), (1405, 14558), (2510, 8149), (2810, 7279)]