78421520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{23909}}^1$

素因数の和:23963

約数の個数: 40

約数和(自身を含む): 186784920

約数和(自身を除く): 108363400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 23909, 47818, 95636, 119545, 191272, 239090, 382544, 478180, 956360, 980269, 1912720, 1960538, 3921076, 4901345, 7842152, 9802690, 15684304, 19605380, 39210760, 78421520]

約数ペア:

[(1, 78421520), (2, 39210760), (4, 19605380), (5, 15684304), (8, 9802690), (10, 7842152), (16, 4901345), (20, 3921076), (40, 1960538), (41, 1912720), (80, 980269), (82, 956360), (164, 478180), (205, 382544), (328, 239090), (410, 191272), (656, 119545), (820, 95636), (1640, 47818), (3280, 23909)]