20921880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{24907}}^1$

素因数の和:24928

約数の個数: 64

約数和(自身を含む): 71735040

約数和(自身を除く): 50813160

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 24907, 49814, 74721, 99628, 124535, 149442, 174349, 199256, 249070, 298884, 348698, 373605, 498140, 523047, 597768, 697396, 747210, 871745, 996280, 1046094, 1394792, 1494420, 1743490, 2092188, 2615235, 2988840, 3486980, 4184376, 5230470, 6973960, 10460940, 20921880]

約数ペア:

[(1, 20921880), (2, 10460940), (3, 6973960), (4, 5230470), (5, 4184376), (6, 3486980), (7, 2988840), (8, 2615235), (10, 2092188), (12, 1743490), (14, 1494420), (15, 1394792), (20, 1046094), (21, 996280), (24, 871745), (28, 747210), (30, 697396), (35, 597768), (40, 523047), (42, 498140), (56, 373605), (60, 348698), (70, 298884), (84, 249070), (105, 199256), (120, 174349), (140, 149442), (168, 124535), (210, 99628), (280, 74721), (420, 49814), (840, 24907)]