91991290

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{2521}}^1$

素因数の和:2658

約数の個数: 32

約数和(自身を含む): 171596880

約数和(自身を除く): 79605590

約数列:

[1, 2, 5, 10, 41, 82, 89, 178, 205, 410, 445, 890, 2521, 3649, 5042, 7298, 12605, 18245, 25210, 36490, 103361, 206722, 224369, 448738, 516805, 1033610, 1121845, 2243690, 9199129, 18398258, 45995645, 91991290]

約数ペア:

[(1, 91991290), (2, 45995645), (5, 18398258), (10, 9199129), (41, 2243690), (82, 1121845), (89, 1033610), (178, 516805), (205, 448738), (410, 224369), (445, 206722), (890, 103361), (2521, 36490), (3649, 25210), (5042, 18245), (7298, 12605)]