21117910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{491}}^1$

素因数の和:549

約数の個数: 64

約数和(自身を含む): 45909504

約数和(自身を除く): 24791594

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 34, 46, 55, 85, 110, 115, 170, 187, 230, 253, 374, 391, 491, 506, 782, 935, 982, 1265, 1870, 1955, 2455, 2530, 3910, 4301, 4910, 5401, 8347, 8602, 10802, 11293, 16694, 21505, 22586, 27005, 41735, 43010, 54010, 56465, 83470, 91817, 112930, 124223, 183634, 191981, 248446, 383962, 459085, 621115, 918170, 959905, 1242230, 1919810, 2111791, 4223582, 10558955, 21117910]

約数ペア:

[(1, 21117910), (2, 10558955), (5, 4223582), (10, 2111791), (11, 1919810), (17, 1242230), (22, 959905), (23, 918170), (34, 621115), (46, 459085), (55, 383962), (85, 248446), (110, 191981), (115, 183634), (170, 124223), (187, 112930), (230, 91817), (253, 83470), (374, 56465), (391, 54010), (491, 43010), (506, 41735), (782, 27005), (935, 22586), (982, 21505), (1265, 16694), (1870, 11293), (1955, 10802), (2455, 8602), (2530, 8347), (3910, 5401), (4301, 4910)]