20729120

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7621}}^1$

素因数の和:7653

約数の個数: 48

約数和(自身を含む): 51860088

約数和(自身を除く): 31130968

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7621, 15242, 30484, 38105, 60968, 76210, 121936, 129557, 152420, 243872, 259114, 304840, 518228, 609680, 647785, 1036456, 1219360, 1295570, 2072912, 2591140, 4145824, 5182280, 10364560, 20729120]

約数ペア:

[(1, 20729120), (2, 10364560), (4, 5182280), (5, 4145824), (8, 2591140), (10, 2072912), (16, 1295570), (17, 1219360), (20, 1036456), (32, 647785), (34, 609680), (40, 518228), (68, 304840), (80, 259114), (85, 243872), (136, 152420), (160, 129557), (170, 121936), (272, 76210), (340, 60968), (544, 38105), (680, 30484), (1360, 15242), (2720, 7621)]