19911015

素因数分解:

$3^4\times 5^1\times {\mathrm{211}}^1\times {\mathrm{233}}^1$

素因数の和:461

約数の個数: 40

約数和(自身を含む): 36015408

約数和(自身を除く): 16104393

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 211, 233, 405, 633, 699, 1055, 1165, 1899, 2097, 3165, 3495, 5697, 6291, 9495, 10485, 17091, 18873, 28485, 31455, 49163, 85455, 94365, 147489, 245815, 442467, 737445, 1327401, 2212335, 3982203, 6637005, 19911015]

約数ペア:

[(1, 19911015), (3, 6637005), (5, 3982203), (9, 2212335), (15, 1327401), (27, 737445), (45, 442467), (81, 245815), (135, 147489), (211, 94365), (233, 85455), (405, 49163), (633, 31455), (699, 28485), (1055, 18873), (1165, 17091), (1899, 10485), (2097, 9495), (3165, 6291), (3495, 5697)]