20801715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 37320864

約数和(自身を除く): 16519149

約数列:

[1, 3, 5, 11, 15, 33, 55, 73, 121, 157, 165, 219, 363, 365, 471, 605, 785, 803, 1095, 1727, 1815, 2355, 2409, 4015, 5181, 8635, 8833, 11461, 12045, 18997, 25905, 26499, 34383, 44165, 56991, 57305, 94985, 126071, 132495, 171915, 284955, 378213, 630355, 1386781, 1891065, 4160343, 6933905, 20801715]

約数ペア:

[(1, 20801715), (3, 6933905), (5, 4160343), (11, 1891065), (15, 1386781), (33, 630355), (55, 378213), (73, 284955), (121, 171915), (157, 132495), (165, 126071), (219, 94985), (363, 57305), (365, 56991), (471, 44165), (605, 34383), (785, 26499), (803, 25905), (1095, 18997), (1727, 12045), (1815, 11461), (2355, 8833), (2409, 8635), (4015, 5181)]