18710360

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{191}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 44236800

約数和(自身を除く): 25526440

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 191, 248, 310, 316, 382, 395, 620, 632, 764, 790, 955, 1240, 1528, 1580, 1910, 2449, 3160, 3820, 4898, 5921, 7640, 9796, 11842, 12245, 15089, 19592, 23684, 24490, 29605, 30178, 47368, 48980, 59210, 60356, 75445, 97960, 118420, 120712, 150890, 236840, 301780, 467759, 603560, 935518, 1871036, 2338795, 3742072, 4677590, 9355180, 18710360]

約数ペア:

[(1, 18710360), (2, 9355180), (4, 4677590), (5, 3742072), (8, 2338795), (10, 1871036), (20, 935518), (31, 603560), (40, 467759), (62, 301780), (79, 236840), (124, 150890), (155, 120712), (158, 118420), (191, 97960), (248, 75445), (310, 60356), (316, 59210), (382, 48980), (395, 47368), (620, 30178), (632, 29605), (764, 24490), (790, 23684), (955, 19592), (1240, 15089), (1528, 12245), (1580, 11842), (1910, 9796), (2449, 7640), (3160, 5921), (3820, 4898)]