20720200

素因数分解:

$2^3\times 5^2\times {\mathrm{211}}^1\times {\mathrm{491}}^1$

素因数の和:718

約数の個数: 48

約数和(自身を含む): 48501360

約数和(自身を除く): 27781160

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 211, 422, 491, 844, 982, 1055, 1688, 1964, 2110, 2455, 3928, 4220, 4910, 5275, 8440, 9820, 10550, 12275, 19640, 21100, 24550, 42200, 49100, 98200, 103601, 207202, 414404, 518005, 828808, 1036010, 2072020, 2590025, 4144040, 5180050, 10360100, 20720200]

約数ペア:

[(1, 20720200), (2, 10360100), (4, 5180050), (5, 4144040), (8, 2590025), (10, 2072020), (20, 1036010), (25, 828808), (40, 518005), (50, 414404), (100, 207202), (200, 103601), (211, 98200), (422, 49100), (491, 42200), (844, 24550), (982, 21100), (1055, 19640), (1688, 12275), (1964, 10550), (2110, 9820), (2455, 8440), (3928, 5275), (4220, 4910)]