21278988

素因数分解:

$2^2\times 3^2\times {\mathrm{149}}^1\times {\mathrm{3967}}^1$

素因数の和:4126

約数の個数: 36

約数和(自身を含む): 54163200

約数和(自身を除く): 32884212

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 149, 298, 447, 596, 894, 1341, 1788, 2682, 3967, 5364, 7934, 11901, 15868, 23802, 35703, 47604, 71406, 142812, 591083, 1182166, 1773249, 2364332, 3546498, 5319747, 7092996, 10639494, 21278988]

約数ペア:

[(1, 21278988), (2, 10639494), (3, 7092996), (4, 5319747), (6, 3546498), (9, 2364332), (12, 1773249), (18, 1182166), (36, 591083), (149, 142812), (298, 71406), (447, 47604), (596, 35703), (894, 23802), (1341, 15868), (1788, 11901), (2682, 7934), (3967, 5364)]