81948100

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^3\times {\mathrm{373}}^1$

素因数の和:426

約数の個数: 72

約数和(自身を含む): 193156040

約数和(自身を除く): 111207940

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 169, 260, 325, 338, 373, 650, 676, 746, 845, 1300, 1492, 1690, 1865, 2197, 3380, 3730, 4225, 4394, 4849, 7460, 8450, 8788, 9325, 9698, 10985, 16900, 18650, 19396, 21970, 24245, 37300, 43940, 48490, 54925, 63037, 96980, 109850, 121225, 126074, 219700, 242450, 252148, 315185, 484900, 630370, 819481, 1260740, 1575925, 1638962, 3151850, 3277924, 4097405, 6303700, 8194810, 16389620, 20487025, 40974050, 81948100]

約数ペア:

[(1, 81948100), (2, 40974050), (4, 20487025), (5, 16389620), (10, 8194810), (13, 6303700), (20, 4097405), (25, 3277924), (26, 3151850), (50, 1638962), (52, 1575925), (65, 1260740), (100, 819481), (130, 630370), (169, 484900), (260, 315185), (325, 252148), (338, 242450), (373, 219700), (650, 126074), (676, 121225), (746, 109850), (845, 96980), (1300, 63037), (1492, 54925), (1690, 48490), (1865, 43940), (2197, 37300), (3380, 24245), (3730, 21970), (4225, 19396), (4394, 18650), (4849, 16900), (7460, 10985), (8450, 9698), (8788, 9325)]