208020980

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{170509}}^1$

素因数の和:170579

約数の個数: 24

約数和(自身を含む): 444008040

約数和(自身を除く): 235987060

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 170509, 341018, 682036, 852545, 1705090, 3410180, 10401049, 20802098, 41604196, 52005245, 104010490, 208020980]

約数ペア:

[(1, 208020980), (2, 104010490), (4, 52005245), (5, 41604196), (10, 20802098), (20, 10401049), (61, 3410180), (122, 1705090), (244, 852545), (305, 682036), (610, 341018), (1220, 170509)]