21420498

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:279

約数の個数: 64

約数和(自身を含む): 49600512

約数和(自身を除く): 28180014

約数列:

[1, 2, 3, 6, 11, 22, 23, 33, 46, 66, 69, 103, 137, 138, 206, 253, 274, 309, 411, 506, 618, 759, 822, 1133, 1507, 1518, 2266, 2369, 3014, 3151, 3399, 4521, 4738, 6302, 6798, 7107, 9042, 9453, 14111, 14214, 18906, 26059, 28222, 34661, 42333, 52118, 69322, 78177, 84666, 103983, 155221, 156354, 207966, 310442, 324553, 465663, 649106, 931326, 973659, 1947318, 3570083, 7140166, 10710249, 21420498]

約数ペア:

[(1, 21420498), (2, 10710249), (3, 7140166), (6, 3570083), (11, 1947318), (22, 973659), (23, 931326), (33, 649106), (46, 465663), (66, 324553), (69, 310442), (103, 207966), (137, 156354), (138, 155221), (206, 103983), (253, 84666), (274, 78177), (309, 69322), (411, 52118), (506, 42333), (618, 34661), (759, 28222), (822, 26059), (1133, 18906), (1507, 14214), (1518, 14111), (2266, 9453), (2369, 9042), (3014, 7107), (3151, 6798), (3399, 6302), (4521, 4738)]