20123774980

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{317}}^1\times {\mathrm{77417}}^1$

素因数の和:77784

約数の個数: 48

約数和(自身を含む): 43427781936

約数和(自身を除く): 23304006956

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 317, 410, 634, 820, 1268, 1585, 3170, 6340, 12997, 25994, 51988, 64985, 77417, 129970, 154834, 259940, 309668, 387085, 774170, 1548340, 3174097, 6348194, 12696388, 15870485, 24541189, 31740970, 49082378, 63481940, 98164756, 122705945, 245411890, 490823780, 1006188749, 2012377498, 4024754996, 5030943745, 10061887490, 20123774980]

約数ペア:

[(1, 20123774980), (2, 10061887490), (4, 5030943745), (5, 4024754996), (10, 2012377498), (20, 1006188749), (41, 490823780), (82, 245411890), (164, 122705945), (205, 98164756), (317, 63481940), (410, 49082378), (634, 31740970), (820, 24541189), (1268, 15870485), (1585, 12696388), (3170, 6348194), (6340, 3174097), (12997, 1548340), (25994, 774170), (51988, 387085), (64985, 309668), (77417, 259940), (129970, 154834)]