20472620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{569}}^1$

素因数の和:842

約数の個数: 48

約数和(自身を含む): 49412160

約数和(自身を除く): 28939540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 569, 1028, 1138, 1285, 1799, 2276, 2570, 2845, 3598, 3983, 5140, 5690, 7196, 7966, 8995, 11380, 15932, 17990, 19915, 35980, 39830, 79660, 146233, 292466, 584932, 731165, 1023631, 1462330, 2047262, 2924660, 4094524, 5118155, 10236310, 20472620]

約数ペア:

[(1, 20472620), (2, 10236310), (4, 5118155), (5, 4094524), (7, 2924660), (10, 2047262), (14, 1462330), (20, 1023631), (28, 731165), (35, 584932), (70, 292466), (140, 146233), (257, 79660), (514, 39830), (569, 35980), (1028, 19915), (1138, 17990), (1285, 15932), (1799, 11380), (2276, 8995), (2570, 7966), (2845, 7196), (3598, 5690), (3983, 5140)]