19904420

素因数分解:

$2^2\times 5^1\times {\mathrm{617}}^1\times {\mathrm{1613}}^1$

素因数の和:2239

約数の個数: 24

約数和(自身を含む): 41892984

約数和(自身を除く): 21988564

約数列:

[1, 2, 4, 5, 10, 20, 617, 1234, 1613, 2468, 3085, 3226, 6170, 6452, 8065, 12340, 16130, 32260, 995221, 1990442, 3980884, 4976105, 9952210, 19904420]

約数ペア:

[(1, 19904420), (2, 9952210), (4, 4976105), (5, 3980884), (10, 1990442), (20, 995221), (617, 32260), (1234, 16130), (1613, 12340), (2468, 8065), (3085, 6452), (3226, 6170)]