21790516

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{257}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 43690752

約数和(自身を除く): 21900236

約数列:

[1, 2, 4, 11, 22, 41, 44, 47, 82, 94, 164, 188, 257, 451, 514, 517, 902, 1028, 1034, 1804, 1927, 2068, 2827, 3854, 5654, 7708, 10537, 11308, 12079, 21074, 21197, 24158, 42148, 42394, 48316, 84788, 115907, 132869, 231814, 265738, 463628, 495239, 531476, 990478, 1980956, 5447629, 10895258, 21790516]

約数ペア:

[(1, 21790516), (2, 10895258), (4, 5447629), (11, 1980956), (22, 990478), (41, 531476), (44, 495239), (47, 463628), (82, 265738), (94, 231814), (164, 132869), (188, 115907), (257, 84788), (451, 48316), (514, 42394), (517, 42148), (902, 24158), (1028, 21197), (1034, 21074), (1804, 12079), (1927, 11308), (2068, 10537), (2827, 7708), (3854, 5654)]