20280820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{4673}}^1$

素因数の和:4720

約数の個数: 48

約数和(自身を含む): 50254848

約数和(自身を除く): 29974028

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 217, 310, 434, 620, 868, 1085, 2170, 4340, 4673, 9346, 18692, 23365, 32711, 46730, 65422, 93460, 130844, 144863, 163555, 289726, 327110, 579452, 654220, 724315, 1014041, 1448630, 2028082, 2897260, 4056164, 5070205, 10140410, 20280820]

約数ペア:

[(1, 20280820), (2, 10140410), (4, 5070205), (5, 4056164), (7, 2897260), (10, 2028082), (14, 1448630), (20, 1014041), (28, 724315), (31, 654220), (35, 579452), (62, 327110), (70, 289726), (124, 163555), (140, 144863), (155, 130844), (217, 93460), (310, 65422), (434, 46730), (620, 32711), (868, 23365), (1085, 18692), (2170, 9346), (4340, 4673)]