21072800

素因数分解:

$2^5\times 5^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1$

素因数の和:151

約数の個数: 144

約数和(自身を含む): 60746112

約数和(自身を除く): 39673312

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 32, 35, 40, 50, 53, 56, 70, 71, 80, 100, 106, 112, 140, 142, 160, 175, 200, 212, 224, 265, 280, 284, 350, 355, 371, 400, 424, 497, 530, 560, 568, 700, 710, 742, 800, 848, 994, 1060, 1120, 1136, 1325, 1400, 1420, 1484, 1696, 1775, 1855, 1988, 2120, 2272, 2485, 2650, 2800, 2840, 2968, 3550, 3710, 3763, 3976, 4240, 4970, 5300, 5600, 5680, 5936, 7100, 7420, 7526, 7952, 8480, 9275, 9940, 10600, 11360, 11872, 12425, 14200, 14840, 15052, 15904, 18550, 18815, 19880, 21200, 24850, 26341, 28400, 29680, 30104, 37100, 37630, 39760, 42400, 49700, 52682, 56800, 59360, 60208, 74200, 75260, 79520, 94075, 99400, 105364, 120416, 131705, 148400, 150520, 188150, 198800, 210728, 263410, 296800, 301040, 376300, 397600, 421456, 526820, 602080, 658525, 752600, 842912, 1053640, 1317050, 1505200, 2107280, 2634100, 3010400, 4214560, 5268200, 10536400, 21072800]

約数ペア:

[(1, 21072800), (2, 10536400), (4, 5268200), (5, 4214560), (7, 3010400), (8, 2634100), (10, 2107280), (14, 1505200), (16, 1317050), (20, 1053640), (25, 842912), (28, 752600), (32, 658525), (35, 602080), (40, 526820), (50, 421456), (53, 397600), (56, 376300), (70, 301040), (71, 296800), (80, 263410), (100, 210728), (106, 198800), (112, 188150), (140, 150520), (142, 148400), (160, 131705), (175, 120416), (200, 105364), (212, 99400), (224, 94075), (265, 79520), (280, 75260), (284, 74200), (350, 60208), (355, 59360), (371, 56800), (400, 52682), (424, 49700), (497, 42400), (530, 39760), (560, 37630), (568, 37100), (700, 30104), (710, 29680), (742, 28400), (800, 26341), (848, 24850), (994, 21200), (1060, 19880), (1120, 18815), (1136, 18550), (1325, 15904), (1400, 15052), (1420, 14840), (1484, 14200), (1696, 12425), (1775, 11872), (1855, 11360), (1988, 10600), (2120, 9940), (2272, 9275), (2485, 8480), (2650, 7952), (2800, 7526), (2840, 7420), (2968, 7100), (3550, 5936), (3710, 5680), (3763, 5600), (3976, 5300), (4240, 4970)]