21459560

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6791}}^1$

素因数の和:6881

約数の個数: 32

約数和(自身を含む): 48902400

約数和(自身を除く): 27442840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6791, 13582, 27164, 33955, 54328, 67910, 135820, 271640, 536489, 1072978, 2145956, 2682445, 4291912, 5364890, 10729780, 21459560]

約数ペア:

[(1, 21459560), (2, 10729780), (4, 5364890), (5, 4291912), (8, 2682445), (10, 2145956), (20, 1072978), (40, 536489), (79, 271640), (158, 135820), (316, 67910), (395, 54328), (632, 33955), (790, 27164), (1580, 13582), (3160, 6791)]