21685365

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1951}}^1$

素因数の和:1994

約数の個数: 48

約数和(自身を含む): 42631680

約数和(自身を除く): 20946315

約数列:

[1, 3, 5, 9, 13, 15, 19, 39, 45, 57, 65, 95, 117, 171, 195, 247, 285, 585, 741, 855, 1235, 1951, 2223, 3705, 5853, 9755, 11115, 17559, 25363, 29265, 37069, 76089, 87795, 111207, 126815, 185345, 228267, 333621, 380445, 481897, 556035, 1141335, 1445691, 1668105, 2409485, 4337073, 7228455, 21685365]

約数ペア:

[(1, 21685365), (3, 7228455), (5, 4337073), (9, 2409485), (13, 1668105), (15, 1445691), (19, 1141335), (39, 556035), (45, 481897), (57, 380445), (65, 333621), (95, 228267), (117, 185345), (171, 126815), (195, 111207), (247, 87795), (285, 76089), (585, 37069), (741, 29265), (855, 25363), (1235, 17559), (1951, 11115), (2223, 9755), (3705, 5853)]