256831280

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{103561}}^1$

素因数の和:103605

約数の個数: 40

約数和(自身を含む): 616401024

約数和(自身を除く): 359569744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 103561, 207122, 414244, 517805, 828488, 1035610, 1656976, 2071220, 3210391, 4142440, 6420782, 8284880, 12841564, 16051955, 25683128, 32103910, 51366256, 64207820, 128415640, 256831280]

約数ペア:

[(1, 256831280), (2, 128415640), (4, 64207820), (5, 51366256), (8, 32103910), (10, 25683128), (16, 16051955), (20, 12841564), (31, 8284880), (40, 6420782), (62, 4142440), (80, 3210391), (124, 2071220), (155, 1656976), (248, 1035610), (310, 828488), (496, 517805), (620, 414244), (1240, 207122), (2480, 103561)]