19968260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{76801}}^1$

素因数の和:76823

約数の個数: 24

約数和(自身を含む): 45159576

約数和(自身を除く): 25191316

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 76801, 153602, 307204, 384005, 768010, 998413, 1536020, 1996826, 3993652, 4992065, 9984130, 19968260]

約数ペア:

[(1, 19968260), (2, 9984130), (4, 4992065), (5, 3993652), (10, 1996826), (13, 1536020), (20, 998413), (26, 768010), (52, 384005), (65, 307204), (130, 153602), (260, 76801)]