405163280

素因数分解:

$2^4\times 5^1\times {\mathrm{641}}^1\times {\mathrm{7901}}^1$

素因数の和:8555

約数の個数: 40

約数和(自身を含む): 943593624

約数和(自身を除く): 538430344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 641, 1282, 2564, 3205, 5128, 6410, 7901, 10256, 12820, 15802, 25640, 31604, 39505, 51280, 63208, 79010, 126416, 158020, 316040, 632080, 5064541, 10129082, 20258164, 25322705, 40516328, 50645410, 81032656, 101290820, 202581640, 405163280]

約数ペア:

[(1, 405163280), (2, 202581640), (4, 101290820), (5, 81032656), (8, 50645410), (10, 40516328), (16, 25322705), (20, 20258164), (40, 10129082), (80, 5064541), (641, 632080), (1282, 316040), (2564, 158020), (3205, 126416), (5128, 79010), (6410, 63208), (7901, 51280), (10256, 39505), (12820, 31604), (15802, 25640)]