19920940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4507}}^1$

素因数の和:4546

約数の個数: 48

約数和(自身を含む): 47712672

約数和(自身を除く): 27791732

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4507, 9014, 18028, 22535, 45070, 58591, 76619, 90140, 117182, 153238, 234364, 292955, 306476, 383095, 585910, 766190, 996047, 1171820, 1532380, 1992094, 3984188, 4980235, 9960470, 19920940]

約数ペア:

[(1, 19920940), (2, 9960470), (4, 4980235), (5, 3984188), (10, 1992094), (13, 1532380), (17, 1171820), (20, 996047), (26, 766190), (34, 585910), (52, 383095), (65, 306476), (68, 292955), (85, 234364), (130, 153238), (170, 117182), (221, 90140), (260, 76619), (340, 58591), (442, 45070), (884, 22535), (1105, 18028), (2210, 9014), (4420, 4507)]