21115666

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:187

約数の個数: 64

約数和(自身を含む): 40715136

約数和(自身を除く): 19599470

約数列:

[1, 2, 11, 13, 17, 22, 26, 34, 43, 86, 101, 143, 187, 202, 221, 286, 374, 442, 473, 559, 731, 946, 1111, 1118, 1313, 1462, 1717, 2222, 2431, 2626, 3434, 4343, 4862, 6149, 8041, 8686, 9503, 12298, 14443, 16082, 18887, 19006, 22321, 28886, 37774, 44642, 47773, 56459, 73831, 95546, 104533, 112918, 147662, 209066, 245531, 491062, 621049, 812141, 959803, 1242098, 1624282, 1919606, 10557833, 21115666]

約数ペア:

[(1, 21115666), (2, 10557833), (11, 1919606), (13, 1624282), (17, 1242098), (22, 959803), (26, 812141), (34, 621049), (43, 491062), (86, 245531), (101, 209066), (143, 147662), (187, 112918), (202, 104533), (221, 95546), (286, 73831), (374, 56459), (442, 47773), (473, 44642), (559, 37774), (731, 28886), (946, 22321), (1111, 19006), (1118, 18887), (1313, 16082), (1462, 14443), (1717, 12298), (2222, 9503), (2431, 8686), (2626, 8041), (3434, 6149), (4343, 4862)]