21797860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{155699}}^1$

素因数の和:155715

約数の個数: 24

約数和(自身を含む): 52315200

約数和(自身を除く): 30517340

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 155699, 311398, 622796, 778495, 1089893, 1556990, 2179786, 3113980, 4359572, 5449465, 10898930, 21797860]

約数ペア:

[(1, 21797860), (2, 10898930), (4, 5449465), (5, 4359572), (7, 3113980), (10, 2179786), (14, 1556990), (20, 1089893), (28, 778495), (35, 622796), (70, 311398), (140, 155699)]