20178044620

素因数分解:

$2^2\times 5^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1\times {\mathrm{25679}}^1$

素因数の和:26178

約数の個数: 48

約数和(自身を含む): 42905116800

約数和(自身を除く): 22727072180

約数列:

[1, 2, 4, 5, 10, 20, 101, 202, 389, 404, 505, 778, 1010, 1556, 1945, 2020, 3890, 7780, 25679, 39289, 51358, 78578, 102716, 128395, 157156, 196445, 256790, 392890, 513580, 785780, 2593579, 5187158, 9989131, 10374316, 12967895, 19978262, 25935790, 39956524, 49945655, 51871580, 99891310, 199782620, 1008902231, 2017804462, 4035608924, 5044511155, 10089022310, 20178044620]

約数ペア:

[(1, 20178044620), (2, 10089022310), (4, 5044511155), (5, 4035608924), (10, 2017804462), (20, 1008902231), (101, 199782620), (202, 99891310), (389, 51871580), (404, 49945655), (505, 39956524), (778, 25935790), (1010, 19978262), (1556, 12967895), (1945, 10374316), (2020, 9989131), (3890, 5187158), (7780, 2593579), (25679, 785780), (39289, 513580), (51358, 392890), (78578, 256790), (102716, 196445), (128395, 157156)]