20503875

素因数分解:

$3^1\times 5^3\times 7^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:205

約数の個数: 64

約数和(自身を含む): 39896064

約数和(自身を除く): 19392189

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 73, 75, 105, 107, 125, 175, 219, 321, 365, 375, 511, 525, 535, 749, 875, 1095, 1533, 1605, 1825, 2247, 2555, 2625, 2675, 3745, 5475, 7665, 7811, 8025, 9125, 11235, 12775, 13375, 18725, 23433, 27375, 38325, 39055, 40125, 54677, 56175, 63875, 93625, 117165, 164031, 191625, 195275, 273385, 280875, 585825, 820155, 976375, 1366925, 2929125, 4100775, 6834625, 20503875]

約数ペア:

[(1, 20503875), (3, 6834625), (5, 4100775), (7, 2929125), (15, 1366925), (21, 976375), (25, 820155), (35, 585825), (73, 280875), (75, 273385), (105, 195275), (107, 191625), (125, 164031), (175, 117165), (219, 93625), (321, 63875), (365, 56175), (375, 54677), (511, 40125), (525, 39055), (535, 38325), (749, 27375), (875, 23433), (1095, 18725), (1533, 13375), (1605, 12775), (1825, 11235), (2247, 9125), (2555, 8025), (2625, 7811), (2675, 7665), (3745, 5475)]