21784971

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:571

約数の個数: 32

約数和(自身を含む): 33230848

約数和(自身を除く): 11445877

約数列:

[1, 3, 13, 31, 37, 39, 93, 111, 403, 481, 487, 1147, 1209, 1443, 1461, 3441, 6331, 14911, 15097, 18019, 18993, 44733, 45291, 54057, 196261, 234247, 558589, 588783, 702741, 1675767, 7261657, 21784971]

約数ペア:

[(1, 21784971), (3, 7261657), (13, 1675767), (31, 702741), (37, 588783), (39, 558589), (93, 234247), (111, 196261), (403, 54057), (481, 45291), (487, 44733), (1147, 18993), (1209, 18019), (1443, 15097), (1461, 14911), (3441, 6331)]