20010040

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{233}}^1$

素因数の和:376

約数の個数: 64

約数和(自身を含む): 48016800

約数和(自身を除く): 28006760

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 113, 152, 190, 226, 233, 380, 452, 466, 565, 760, 904, 932, 1130, 1165, 1864, 2147, 2260, 2330, 4294, 4427, 4520, 4660, 8588, 8854, 9320, 10735, 17176, 17708, 21470, 22135, 26329, 35416, 42940, 44270, 52658, 85880, 88540, 105316, 131645, 177080, 210632, 263290, 500251, 526580, 1000502, 1053160, 2001004, 2501255, 4002008, 5002510, 10005020, 20010040]

約数ペア:

[(1, 20010040), (2, 10005020), (4, 5002510), (5, 4002008), (8, 2501255), (10, 2001004), (19, 1053160), (20, 1000502), (38, 526580), (40, 500251), (76, 263290), (95, 210632), (113, 177080), (152, 131645), (190, 105316), (226, 88540), (233, 85880), (380, 52658), (452, 44270), (466, 42940), (565, 35416), (760, 26329), (904, 22135), (932, 21470), (1130, 17708), (1165, 17176), (1864, 10735), (2147, 9320), (2260, 8854), (2330, 8588), (4294, 4660), (4427, 4520)]