20900475

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4889}}^1$

素因数の和:4924

約数の個数: 36

約数和(自身を含む): 39413400

約数和(自身を除く): 18512925

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4889, 14667, 24445, 44001, 73335, 92891, 122225, 220005, 278673, 366675, 464455, 836019, 1100025, 1393365, 2322275, 4180095, 6966825, 20900475]

約数ペア:

[(1, 20900475), (3, 6966825), (5, 4180095), (9, 2322275), (15, 1393365), (19, 1100025), (25, 836019), (45, 464455), (57, 366675), (75, 278673), (95, 220005), (171, 122225), (225, 92891), (285, 73335), (475, 44001), (855, 24445), (1425, 14667), (4275, 4889)]