291260560

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{18481}}^1$

素因数の和:18691

約数の個数: 40

約数和(自身を含む): 680655096

約数和(自身を除く): 389394536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 15760, 18481, 36962, 73924, 92405, 147848, 184810, 295696, 369620, 739240, 1478480, 3640757, 7281514, 14563028, 18203785, 29126056, 36407570, 58252112, 72815140, 145630280, 291260560]

約数ペア:

[(1, 291260560), (2, 145630280), (4, 72815140), (5, 58252112), (8, 36407570), (10, 29126056), (16, 18203785), (20, 14563028), (40, 7281514), (80, 3640757), (197, 1478480), (394, 739240), (788, 369620), (985, 295696), (1576, 184810), (1970, 147848), (3152, 92405), (3940, 73924), (7880, 36962), (15760, 18481)]