20901860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{863}}^1$

素因数の和:1052

約数の個数: 48

約数和(自身を含む): 50512896

約数和(自身を除く): 29611036

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 173, 346, 692, 863, 865, 1211, 1726, 1730, 2422, 3452, 3460, 4315, 4844, 6041, 6055, 8630, 12082, 12110, 17260, 24164, 24220, 30205, 60410, 120820, 149299, 298598, 597196, 746495, 1045093, 1492990, 2090186, 2985980, 4180372, 5225465, 10450930, 20901860]

約数ペア:

[(1, 20901860), (2, 10450930), (4, 5225465), (5, 4180372), (7, 2985980), (10, 2090186), (14, 1492990), (20, 1045093), (28, 746495), (35, 597196), (70, 298598), (140, 149299), (173, 120820), (346, 60410), (692, 30205), (863, 24220), (865, 24164), (1211, 17260), (1726, 12110), (1730, 12082), (2422, 8630), (3452, 6055), (3460, 6041), (4315, 4844)]