101428280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{521}}^1$

素因数の和:720

約数の個数: 64

約数和(自身を含む): 237530880

約数和(自身を除く): 136102600

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 157, 248, 310, 314, 521, 620, 628, 785, 1042, 1240, 1256, 1570, 2084, 2605, 3140, 4168, 4867, 5210, 6280, 9734, 10420, 16151, 19468, 20840, 24335, 32302, 38936, 48670, 64604, 80755, 81797, 97340, 129208, 161510, 163594, 194680, 323020, 327188, 408985, 646040, 654376, 817970, 1635940, 2535707, 3271880, 5071414, 10142828, 12678535, 20285656, 25357070, 50714140, 101428280]

約数ペア:

[(1, 101428280), (2, 50714140), (4, 25357070), (5, 20285656), (8, 12678535), (10, 10142828), (20, 5071414), (31, 3271880), (40, 2535707), (62, 1635940), (124, 817970), (155, 654376), (157, 646040), (248, 408985), (310, 327188), (314, 323020), (521, 194680), (620, 163594), (628, 161510), (785, 129208), (1042, 97340), (1240, 81797), (1256, 80755), (1570, 64604), (2084, 48670), (2605, 38936), (3140, 32302), (4168, 24335), (4867, 20840), (5210, 19468), (6280, 16151), (9734, 10420)]