9905120

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1997}}^1$

素因数の和:2043

約数の個数: 48

約数和(自身を含む): 24167808

約数和(自身を除く): 14262688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 1997, 2480, 3994, 4960, 7988, 9985, 15976, 19970, 31952, 39940, 61907, 63904, 79880, 123814, 159760, 247628, 309535, 319520, 495256, 619070, 990512, 1238140, 1981024, 2476280, 4952560, 9905120]

約数ペア:

[(1, 9905120), (2, 4952560), (4, 2476280), (5, 1981024), (8, 1238140), (10, 990512), (16, 619070), (20, 495256), (31, 319520), (32, 309535), (40, 247628), (62, 159760), (80, 123814), (124, 79880), (155, 63904), (160, 61907), (248, 39940), (310, 31952), (496, 19970), (620, 15976), (992, 9985), (1240, 7988), (1997, 4960), (2480, 3994)]