20707515

素因数分解:

$3^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{977}}^1$

素因数の和:1148

約数の個数: 32

約数和(自身を含む): 37085760

約数和(自身を除く): 16378245

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157, 471, 785, 977, 1413, 2355, 2931, 4239, 4885, 7065, 8793, 14655, 21195, 26379, 43965, 131895, 153389, 460167, 766945, 1380501, 2300835, 4141503, 6902505, 20707515]

約数ペア:

[(1, 20707515), (3, 6902505), (5, 4141503), (9, 2300835), (15, 1380501), (27, 766945), (45, 460167), (135, 153389), (157, 131895), (471, 43965), (785, 26379), (977, 21195), (1413, 14655), (2355, 8793), (2931, 7065), (4239, 4885)]