20539280

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{3517}}^1$

素因数の和:3603

約数の個数: 40

約数和(自身を含む): 48421752

約数和(自身を除く): 27882472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 292, 365, 584, 730, 1168, 1460, 2920, 3517, 5840, 7034, 14068, 17585, 28136, 35170, 56272, 70340, 140680, 256741, 281360, 513482, 1026964, 1283705, 2053928, 2567410, 4107856, 5134820, 10269640, 20539280]

約数ペア:

[(1, 20539280), (2, 10269640), (4, 5134820), (5, 4107856), (8, 2567410), (10, 2053928), (16, 1283705), (20, 1026964), (40, 513482), (73, 281360), (80, 256741), (146, 140680), (292, 70340), (365, 56272), (584, 35170), (730, 28136), (1168, 17585), (1460, 14068), (2920, 7034), (3517, 5840)]