21205902

素因数分解:

$2^1\times 3^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:225

約数の個数: 64

約数和(自身を含む): 47589120

約数和(自身を除く): 26383218

約数列:

[1, 2, 3, 6, 17, 29, 34, 51, 58, 67, 87, 102, 107, 134, 174, 201, 214, 321, 402, 493, 642, 986, 1139, 1479, 1819, 1943, 2278, 2958, 3103, 3417, 3638, 3886, 5457, 5829, 6206, 6834, 7169, 9309, 10914, 11658, 14338, 18618, 21507, 33031, 43014, 52751, 66062, 99093, 105502, 121873, 158253, 198186, 207901, 243746, 316506, 365619, 415802, 623703, 731238, 1247406, 3534317, 7068634, 10602951, 21205902]

約数ペア:

[(1, 21205902), (2, 10602951), (3, 7068634), (6, 3534317), (17, 1247406), (29, 731238), (34, 623703), (51, 415802), (58, 365619), (67, 316506), (87, 243746), (102, 207901), (107, 198186), (134, 158253), (174, 121873), (201, 105502), (214, 99093), (321, 66062), (402, 52751), (493, 43014), (642, 33031), (986, 21507), (1139, 18618), (1479, 14338), (1819, 11658), (1943, 10914), (2278, 9309), (2958, 7169), (3103, 6834), (3417, 6206), (3638, 5829), (3886, 5457)]