21399910

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{983}}^1$

素因数の和:1308

約数の個数: 32

約数和(自身を含む): 44209152

約数和(自身を除く): 22809242

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 311, 622, 983, 1555, 1966, 2177, 3110, 4354, 4915, 6881, 9830, 10885, 13762, 21770, 34405, 68810, 305713, 611426, 1528565, 2139991, 3057130, 4279982, 10699955, 21399910]

約数ペア:

[(1, 21399910), (2, 10699955), (5, 4279982), (7, 3057130), (10, 2139991), (14, 1528565), (35, 611426), (70, 305713), (311, 68810), (622, 34405), (983, 21770), (1555, 13762), (1966, 10885), (2177, 9830), (3110, 6881), (4354, 4915)]