21111310

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1$

素因数の和:241

約数の個数: 64

約数和(自身を含む): 44126208

約数和(自身を除く): 23014898

約数列:

[1, 2, 5, 10, 11, 22, 31, 41, 55, 62, 82, 110, 151, 155, 205, 302, 310, 341, 410, 451, 682, 755, 902, 1271, 1510, 1661, 1705, 2255, 2542, 3322, 3410, 4510, 4681, 6191, 6355, 8305, 9362, 12382, 12710, 13981, 16610, 23405, 27962, 30955, 46810, 51491, 61910, 68101, 69905, 102982, 136202, 139810, 191921, 257455, 340505, 383842, 514910, 681010, 959605, 1919210, 2111131, 4222262, 10555655, 21111310]

約数ペア:

[(1, 21111310), (2, 10555655), (5, 4222262), (10, 2111131), (11, 1919210), (22, 959605), (31, 681010), (41, 514910), (55, 383842), (62, 340505), (82, 257455), (110, 191921), (151, 139810), (155, 136202), (205, 102982), (302, 69905), (310, 68101), (341, 61910), (410, 51491), (451, 46810), (682, 30955), (755, 27962), (902, 23405), (1271, 16610), (1510, 13981), (1661, 12710), (1705, 12382), (2255, 9362), (2542, 8305), (3322, 6355), (3410, 6191), (4510, 4681)]