21980740

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{419}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 48121920

約数和(自身を除く): 26141180

約数列:

[1, 2, 4, 5, 10, 20, 43, 61, 86, 122, 172, 215, 244, 305, 419, 430, 610, 838, 860, 1220, 1676, 2095, 2623, 4190, 5246, 8380, 10492, 13115, 18017, 25559, 26230, 36034, 51118, 52460, 72068, 90085, 102236, 127795, 180170, 255590, 360340, 511180, 1099037, 2198074, 4396148, 5495185, 10990370, 21980740]

約数ペア:

[(1, 21980740), (2, 10990370), (4, 5495185), (5, 4396148), (10, 2198074), (20, 1099037), (43, 511180), (61, 360340), (86, 255590), (122, 180170), (172, 127795), (215, 102236), (244, 90085), (305, 72068), (419, 52460), (430, 51118), (610, 36034), (838, 26230), (860, 25559), (1220, 18017), (1676, 13115), (2095, 10492), (2623, 8380), (4190, 5246)]