21839675

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 32810400

約数和(自身を除く): 10970725

約数列:

[1, 5, 11, 13, 25, 41, 55, 65, 143, 149, 205, 275, 325, 451, 533, 715, 745, 1025, 1639, 1937, 2255, 2665, 3575, 3725, 5863, 6109, 8195, 9685, 11275, 13325, 21307, 29315, 30545, 40975, 48425, 67199, 79417, 106535, 146575, 152725, 335995, 397085, 532675, 873587, 1679975, 1985425, 4367935, 21839675]

約数ペア:

[(1, 21839675), (5, 4367935), (11, 1985425), (13, 1679975), (25, 873587), (41, 532675), (55, 397085), (65, 335995), (143, 152725), (149, 146575), (205, 106535), (275, 79417), (325, 67199), (451, 48425), (533, 40975), (715, 30545), (745, 29315), (1025, 21307), (1639, 13325), (1937, 11275), (2255, 9685), (2665, 8195), (3575, 6109), (3725, 5863)]