21673971

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{97}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 36018528

約数和(自身を除く): 14344557

約数列:

[1, 3, 9, 11, 33, 37, 61, 97, 99, 111, 183, 291, 333, 407, 549, 671, 873, 1067, 1221, 2013, 2257, 3201, 3589, 3663, 5917, 6039, 6771, 9603, 10767, 17751, 20313, 24827, 32301, 39479, 53253, 65087, 74481, 118437, 195261, 218929, 223443, 355311, 585783, 656787, 1970361, 2408219, 7224657, 21673971]

約数ペア:

[(1, 21673971), (3, 7224657), (9, 2408219), (11, 1970361), (33, 656787), (37, 585783), (61, 355311), (97, 223443), (99, 218929), (111, 195261), (183, 118437), (291, 74481), (333, 65087), (407, 53253), (549, 39479), (671, 32301), (873, 24827), (1067, 20313), (1221, 17751), (2013, 10767), (2257, 9603), (3201, 6771), (3589, 6039), (3663, 5917)]