20403145

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{647}}^1$

素因数の和:729

約数の個数: 32

約数和(自身を含む): 30233088

約数和(自身を除く): 9829943

約数列:

[1, 5, 7, 17, 35, 53, 85, 119, 265, 371, 595, 647, 901, 1855, 3235, 4505, 4529, 6307, 10999, 22645, 31535, 34291, 54995, 76993, 171455, 240037, 384965, 582947, 1200185, 2914735, 4080629, 20403145]

約数ペア:

[(1, 20403145), (5, 4080629), (7, 2914735), (17, 1200185), (35, 582947), (53, 384965), (85, 240037), (119, 171455), (265, 76993), (371, 54995), (595, 34291), (647, 31535), (901, 22645), (1855, 10999), (3235, 6307), (4505, 4529)]