251915920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{647}}^1$

素因数の和:848

約数の個数: 80

約数和(自身を含む): 609389568

約数和(自身を除く): 357473648

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 157, 248, 310, 314, 496, 620, 628, 647, 785, 1240, 1256, 1294, 1570, 2480, 2512, 2588, 3140, 3235, 4867, 5176, 6280, 6470, 9734, 10352, 12560, 12940, 19468, 20057, 24335, 25880, 38936, 40114, 48670, 51760, 77872, 80228, 97340, 100285, 101579, 160456, 194680, 200570, 203158, 320912, 389360, 401140, 406316, 507895, 802280, 812632, 1015790, 1604560, 1625264, 2031580, 3148949, 4063160, 6297898, 8126320, 12595796, 15744745, 25191592, 31489490, 50383184, 62978980, 125957960, 251915920]

約数ペア:

[(1, 251915920), (2, 125957960), (4, 62978980), (5, 50383184), (8, 31489490), (10, 25191592), (16, 15744745), (20, 12595796), (31, 8126320), (40, 6297898), (62, 4063160), (80, 3148949), (124, 2031580), (155, 1625264), (157, 1604560), (248, 1015790), (310, 812632), (314, 802280), (496, 507895), (620, 406316), (628, 401140), (647, 389360), (785, 320912), (1240, 203158), (1256, 200570), (1294, 194680), (1570, 160456), (2480, 101579), (2512, 100285), (2588, 97340), (3140, 80228), (3235, 77872), (4867, 51760), (5176, 48670), (6280, 40114), (6470, 38936), (9734, 25880), (10352, 24335), (12560, 20057), (12940, 19468)]