251421690

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{644671}}^1$

素因数の和:644694

約数の個数: 32

約数和(自身を含む): 649829376

約数和(自身を除く): 398407686

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 644671, 1289342, 1934013, 3223355, 3868026, 6446710, 8380723, 9670065, 16761446, 19340130, 25142169, 41903615, 50284338, 83807230, 125710845, 251421690]

約数ペア:

[(1, 251421690), (2, 125710845), (3, 83807230), (5, 50284338), (6, 41903615), (10, 25142169), (13, 19340130), (15, 16761446), (26, 9670065), (30, 8380723), (39, 6446710), (65, 3868026), (78, 3223355), (130, 1934013), (195, 1289342), (390, 644671)]