20019920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13171}}^1$

素因数の和:13203

約数の個数: 40

約数和(自身を含む): 48999840

約数和(自身を除く): 28979920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13171, 26342, 52684, 65855, 105368, 131710, 210736, 250249, 263420, 500498, 526840, 1000996, 1053680, 1251245, 2001992, 2502490, 4003984, 5004980, 10009960, 20019920]

約数ペア:

[(1, 20019920), (2, 10009960), (4, 5004980), (5, 4003984), (8, 2502490), (10, 2001992), (16, 1251245), (19, 1053680), (20, 1000996), (38, 526840), (40, 500498), (76, 263420), (80, 250249), (95, 210736), (152, 131710), (190, 105368), (304, 65855), (380, 52684), (760, 26342), (1520, 13171)]