21809920

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{1549}}^1$

素因数の和:1581

約数の個数: 72

約数和(自身を含む): 57027600

約数和(自身を除く): 35217680

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 128, 160, 176, 220, 256, 320, 352, 440, 640, 704, 880, 1280, 1408, 1549, 1760, 2816, 3098, 3520, 6196, 7040, 7745, 12392, 14080, 15490, 17039, 24784, 30980, 34078, 49568, 61960, 68156, 85195, 99136, 123920, 136312, 170390, 198272, 247840, 272624, 340780, 396544, 495680, 545248, 681560, 991360, 1090496, 1363120, 1982720, 2180992, 2726240, 4361984, 5452480, 10904960, 21809920]

約数ペア:

[(1, 21809920), (2, 10904960), (4, 5452480), (5, 4361984), (8, 2726240), (10, 2180992), (11, 1982720), (16, 1363120), (20, 1090496), (22, 991360), (32, 681560), (40, 545248), (44, 495680), (55, 396544), (64, 340780), (80, 272624), (88, 247840), (110, 198272), (128, 170390), (160, 136312), (176, 123920), (220, 99136), (256, 85195), (320, 68156), (352, 61960), (440, 49568), (640, 34078), (704, 30980), (880, 24784), (1280, 17039), (1408, 15490), (1549, 14080), (1760, 12392), (2816, 7745), (3098, 7040), (3520, 6196)]