31387960

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{19139}}^1$

素因数の和:19191

約数の個数: 32

約数和(自身を含む): 72349200

約数和(自身を除く): 40961240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 19139, 38278, 76556, 95695, 153112, 191390, 382780, 765560, 784699, 1569398, 3138796, 3923495, 6277592, 7846990, 15693980, 31387960]

約数ペア:

[(1, 31387960), (2, 15693980), (4, 7846990), (5, 6277592), (8, 3923495), (10, 3138796), (20, 1569398), (40, 784699), (41, 765560), (82, 382780), (164, 191390), (205, 153112), (328, 95695), (410, 76556), (820, 38278), (1640, 19139)]