21000812

素因数分解:

$2^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{983}}^1$

素因数の和:1110

約数の個数: 36

約数和(自身を含む): 43187760

約数和(自身を除く): 22186948

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 109, 196, 218, 436, 763, 983, 1526, 1966, 3052, 3932, 5341, 6881, 10682, 13762, 21364, 27524, 48167, 96334, 107147, 192668, 214294, 428588, 750029, 1500058, 3000116, 5250203, 10500406, 21000812]

約数ペア:

[(1, 21000812), (2, 10500406), (4, 5250203), (7, 3000116), (14, 1500058), (28, 750029), (49, 428588), (98, 214294), (109, 192668), (196, 107147), (218, 96334), (436, 48167), (763, 27524), (983, 21364), (1526, 13762), (1966, 10682), (3052, 6881), (3932, 5341)]