21221690

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1931}}^1$

素因数の和:2102

約数の個数: 32

約数和(自身を含む): 43956864

約数和(自身を除く): 22735174

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 157, 314, 785, 1099, 1570, 1931, 2198, 3862, 5495, 9655, 10990, 13517, 19310, 27034, 67585, 135170, 303167, 606334, 1515835, 2122169, 3031670, 4244338, 10610845, 21221690]

約数ペア:

[(1, 21221690), (2, 10610845), (5, 4244338), (7, 3031670), (10, 2122169), (14, 1515835), (35, 606334), (70, 303167), (157, 135170), (314, 67585), (785, 27034), (1099, 19310), (1570, 13517), (1931, 10990), (2198, 9655), (3862, 5495)]