256831393

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 48

約数和(自身を含む): 350424144

約数和(自身を除く): 93592751

約数列:

[1, 7, 13, 17, 37, 49, 91, 119, 221, 259, 481, 629, 637, 641, 833, 1547, 1813, 3367, 4403, 4487, 8177, 8333, 10829, 10897, 23569, 23717, 30821, 31409, 57239, 58331, 76279, 141661, 166019, 308321, 400673, 403189, 408317, 533953, 991627, 1162133, 2158247, 2822323, 5241457, 6941389, 15107729, 19756261, 36690199, 256831393]

約数ペア:

[(1, 256831393), (7, 36690199), (13, 19756261), (17, 15107729), (37, 6941389), (49, 5241457), (91, 2822323), (119, 2158247), (221, 1162133), (259, 991627), (481, 533953), (629, 408317), (637, 403189), (641, 400673), (833, 308321), (1547, 166019), (1813, 141661), (3367, 76279), (4403, 58331), (4487, 57239), (8177, 31409), (8333, 30821), (10829, 23717), (10897, 23569)]