216977680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{87491}}^1$

素因数の和:87535

約数の個数: 40

約数和(自身を含む): 520752384

約数和(自身を除く): 303774704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 87491, 174982, 349964, 437455, 699928, 874910, 1399856, 1749820, 2712221, 3499640, 5424442, 6999280, 10848884, 13561105, 21697768, 27122210, 43395536, 54244420, 108488840, 216977680]

約数ペア:

[(1, 216977680), (2, 108488840), (4, 54244420), (5, 43395536), (8, 27122210), (10, 21697768), (16, 13561105), (20, 10848884), (31, 6999280), (40, 5424442), (62, 3499640), (80, 2712221), (124, 1749820), (155, 1399856), (248, 874910), (310, 699928), (496, 437455), (620, 349964), (1240, 174982), (2480, 87491)]