21007240

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{30893}}^1$

素因数の和:30921

約数の個数: 32

約数和(自身を含む): 50048280

約数和(自身を除く): 29041040

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 30893, 61786, 123572, 154465, 247144, 308930, 525181, 617860, 1050362, 1235720, 2100724, 2625905, 4201448, 5251810, 10503620, 21007240]

約数ペア:

[(1, 21007240), (2, 10503620), (4, 5251810), (5, 4201448), (8, 2625905), (10, 2100724), (17, 1235720), (20, 1050362), (34, 617860), (40, 525181), (68, 308930), (85, 247144), (136, 154465), (170, 123572), (340, 61786), (680, 30893)]