20398875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{409}}^1$

素因数の和:453

約数の個数: 64

約数和(自身を含む): 40934400

約数和(自身を除く): 20535525

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 57, 75, 95, 105, 125, 133, 175, 285, 375, 399, 409, 475, 525, 665, 875, 1227, 1425, 1995, 2045, 2375, 2625, 2863, 3325, 6135, 7125, 7771, 8589, 9975, 10225, 14315, 16625, 23313, 30675, 38855, 42945, 49875, 51125, 54397, 71575, 116565, 153375, 163191, 194275, 214725, 271985, 357875, 582825, 815955, 971375, 1073625, 1359925, 2914125, 4079775, 6799625, 20398875]

約数ペア:

[(1, 20398875), (3, 6799625), (5, 4079775), (7, 2914125), (15, 1359925), (19, 1073625), (21, 971375), (25, 815955), (35, 582825), (57, 357875), (75, 271985), (95, 214725), (105, 194275), (125, 163191), (133, 153375), (175, 116565), (285, 71575), (375, 54397), (399, 51125), (409, 49875), (475, 42945), (525, 38855), (665, 30675), (875, 23313), (1227, 16625), (1425, 14315), (1995, 10225), (2045, 9975), (2375, 8589), (2625, 7771), (2863, 7125), (3325, 6135)]