64884520

素因数分解:

$2^3\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3853}}^1$

素因数の和:4285

約数の個数: 32

約数和(自身を含む): 146374920

約数和(自身を除く): 81490400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 421, 842, 1684, 2105, 3368, 3853, 4210, 7706, 8420, 15412, 16840, 19265, 30824, 38530, 77060, 154120, 1622113, 3244226, 6488452, 8110565, 12976904, 16221130, 32442260, 64884520]

約数ペア:

[(1, 64884520), (2, 32442260), (4, 16221130), (5, 12976904), (8, 8110565), (10, 6488452), (20, 3244226), (40, 1622113), (421, 154120), (842, 77060), (1684, 38530), (2105, 30824), (3368, 19265), (3853, 16840), (4210, 15412), (7706, 8420)]