12978500

素因数分解:

$2^2\times 5^3\times {\mathrm{101}}^1\times {\mathrm{257}}^1$

素因数の和:377

約数の個数: 48

約数和(自身を含む): 28737072

約数和(自身を除く): 15758572

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 101, 125, 202, 250, 257, 404, 500, 505, 514, 1010, 1028, 1285, 2020, 2525, 2570, 5050, 5140, 6425, 10100, 12625, 12850, 25250, 25700, 25957, 32125, 50500, 51914, 64250, 103828, 128500, 129785, 259570, 519140, 648925, 1297850, 2595700, 3244625, 6489250, 12978500]

約数ペア:

[(1, 12978500), (2, 6489250), (4, 3244625), (5, 2595700), (10, 1297850), (20, 648925), (25, 519140), (50, 259570), (100, 129785), (101, 128500), (125, 103828), (202, 64250), (250, 51914), (257, 50500), (404, 32125), (500, 25957), (505, 25700), (514, 25250), (1010, 12850), (1028, 12625), (1285, 10100), (2020, 6425), (2525, 5140), (2570, 5050)]