21918550

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:301

約数の個数: 48

約数和(自身を含む): 42854400

約数和(自身を除く): 20935850

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 79, 155, 158, 179, 310, 358, 395, 775, 790, 895, 1550, 1790, 1975, 2449, 3950, 4475, 4898, 5549, 8950, 11098, 12245, 14141, 24490, 27745, 28282, 55490, 61225, 70705, 122450, 138725, 141410, 277450, 353525, 438371, 707050, 876742, 2191855, 4383710, 10959275, 21918550]

約数ペア:

[(1, 21918550), (2, 10959275), (5, 4383710), (10, 2191855), (25, 876742), (31, 707050), (50, 438371), (62, 353525), (79, 277450), (155, 141410), (158, 138725), (179, 122450), (310, 70705), (358, 61225), (395, 55490), (775, 28282), (790, 27745), (895, 24490), (1550, 14141), (1790, 12245), (1975, 11098), (2449, 8950), (3950, 5549), (4475, 4898)]