21235060

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13789}}^1$

素因数の和:13816

約数の個数: 48

約数和(自身を含む): 55601280

約数和(自身を除く): 34366220

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 55, 70, 77, 110, 140, 154, 220, 308, 385, 770, 1540, 13789, 27578, 55156, 68945, 96523, 137890, 151679, 193046, 275780, 303358, 386092, 482615, 606716, 758395, 965230, 1061753, 1516790, 1930460, 2123506, 3033580, 4247012, 5308765, 10617530, 21235060]

約数ペア:

[(1, 21235060), (2, 10617530), (4, 5308765), (5, 4247012), (7, 3033580), (10, 2123506), (11, 1930460), (14, 1516790), (20, 1061753), (22, 965230), (28, 758395), (35, 606716), (44, 482615), (55, 386092), (70, 303358), (77, 275780), (110, 193046), (140, 151679), (154, 137890), (220, 96523), (308, 68945), (385, 55156), (770, 27578), (1540, 13789)]