81498980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{5231}}^1$

素因数の和:5300

約数の個数: 48

約数和(自身を含む): 184584960

約数和(自身を除く): 103085980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1558, 3116, 3895, 5231, 7790, 10462, 15580, 20924, 26155, 52310, 99389, 104620, 198778, 214471, 397556, 428942, 496945, 857884, 993890, 1072355, 1987780, 2144710, 4074949, 4289420, 8149898, 16299796, 20374745, 40749490, 81498980]

約数ペア:

[(1, 81498980), (2, 40749490), (4, 20374745), (5, 16299796), (10, 8149898), (19, 4289420), (20, 4074949), (38, 2144710), (41, 1987780), (76, 1072355), (82, 993890), (95, 857884), (164, 496945), (190, 428942), (205, 397556), (380, 214471), (410, 198778), (779, 104620), (820, 99389), (1558, 52310), (3116, 26155), (3895, 20924), (5231, 15580), (7790, 10462)]