21665385

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{631}}^1$

素因数の和:758

約数の個数: 48

約数和(自身を含む): 43380480

約数和(自身を除く): 21715095

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 109, 315, 327, 545, 631, 763, 981, 1635, 1893, 2289, 3155, 3815, 4417, 4905, 5679, 6867, 9465, 11445, 13251, 22085, 28395, 34335, 39753, 66255, 68779, 198765, 206337, 343895, 481453, 619011, 1031685, 1444359, 2407265, 3095055, 4333077, 7221795, 21665385]

約数ペア:

[(1, 21665385), (3, 7221795), (5, 4333077), (7, 3095055), (9, 2407265), (15, 1444359), (21, 1031685), (35, 619011), (45, 481453), (63, 343895), (105, 206337), (109, 198765), (315, 68779), (327, 66255), (545, 39753), (631, 34335), (763, 28395), (981, 22085), (1635, 13251), (1893, 11445), (2289, 9465), (3155, 6867), (3815, 5679), (4417, 4905)]