25515640

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{239}}^1$

素因数の和:424

約数の個数: 64

約数和(自身を含む): 61430400

約数和(自身を除く): 35914760

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 157, 170, 239, 314, 340, 478, 628, 680, 785, 956, 1195, 1256, 1570, 1912, 2390, 2669, 3140, 4063, 4780, 5338, 6280, 8126, 9560, 10676, 13345, 16252, 20315, 21352, 26690, 32504, 37523, 40630, 53380, 75046, 81260, 106760, 150092, 162520, 187615, 300184, 375230, 637891, 750460, 1275782, 1500920, 2551564, 3189455, 5103128, 6378910, 12757820, 25515640]

約数ペア:

[(1, 25515640), (2, 12757820), (4, 6378910), (5, 5103128), (8, 3189455), (10, 2551564), (17, 1500920), (20, 1275782), (34, 750460), (40, 637891), (68, 375230), (85, 300184), (136, 187615), (157, 162520), (170, 150092), (239, 106760), (314, 81260), (340, 75046), (478, 53380), (628, 40630), (680, 37523), (785, 32504), (956, 26690), (1195, 21352), (1256, 20315), (1570, 16252), (1912, 13345), (2390, 10676), (2669, 9560), (3140, 8126), (4063, 6280), (4780, 5338)]