20837680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13709}}^1$

素因数の和:13741

約数の個数: 40

約数和(自身を含む): 51001200

約数和(自身を除く): 30163520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13709, 27418, 54836, 68545, 109672, 137090, 219344, 260471, 274180, 520942, 548360, 1041884, 1096720, 1302355, 2083768, 2604710, 4167536, 5209420, 10418840, 20837680]

約数ペア:

[(1, 20837680), (2, 10418840), (4, 5209420), (5, 4167536), (8, 2604710), (10, 2083768), (16, 1302355), (19, 1096720), (20, 1041884), (38, 548360), (40, 520942), (76, 274180), (80, 260471), (95, 219344), (152, 137090), (190, 109672), (304, 68545), (380, 54836), (760, 27418), (1520, 13709)]