21512556

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1069}}^1$

素因数の和:1135

約数の個数: 72

約数和(自身を含む): 59979920

約数和(自身を除く): 38467364

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 43, 52, 78, 86, 117, 129, 156, 172, 234, 258, 387, 468, 516, 559, 774, 1069, 1118, 1548, 1677, 2138, 2236, 3207, 3354, 4276, 5031, 6414, 6708, 9621, 10062, 12828, 13897, 19242, 20124, 27794, 38484, 41691, 45967, 55588, 83382, 91934, 125073, 137901, 166764, 183868, 250146, 275802, 413703, 500292, 551604, 597571, 827406, 1195142, 1654812, 1792713, 2390284, 3585426, 5378139, 7170852, 10756278, 21512556]

約数ペア:

[(1, 21512556), (2, 10756278), (3, 7170852), (4, 5378139), (6, 3585426), (9, 2390284), (12, 1792713), (13, 1654812), (18, 1195142), (26, 827406), (36, 597571), (39, 551604), (43, 500292), (52, 413703), (78, 275802), (86, 250146), (117, 183868), (129, 166764), (156, 137901), (172, 125073), (234, 91934), (258, 83382), (387, 55588), (468, 45967), (516, 41691), (559, 38484), (774, 27794), (1069, 20124), (1118, 19242), (1548, 13897), (1677, 12828), (2138, 10062), (2236, 9621), (3207, 6708), (3354, 6414), (4276, 5031)]