21061880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1$

素因数の和:181

約数の個数: 128

約数和(自身を含む): 59097600

約数和(自身を除く): 38035720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 35, 37, 38, 40, 56, 70, 74, 76, 95, 107, 133, 140, 148, 152, 185, 190, 214, 259, 266, 280, 296, 370, 380, 428, 518, 532, 535, 665, 703, 740, 749, 760, 856, 1036, 1064, 1070, 1295, 1330, 1406, 1480, 1498, 2033, 2072, 2140, 2590, 2660, 2812, 2996, 3515, 3745, 3959, 4066, 4280, 4921, 5180, 5320, 5624, 5992, 7030, 7490, 7918, 8132, 9842, 10165, 10360, 14060, 14231, 14980, 15836, 16264, 19684, 19795, 20330, 24605, 27713, 28120, 28462, 29960, 31672, 39368, 39590, 40660, 49210, 55426, 56924, 71155, 75221, 79180, 81320, 98420, 110852, 113848, 138565, 142310, 150442, 158360, 196840, 221704, 277130, 284620, 300884, 376105, 526547, 554260, 569240, 601768, 752210, 1053094, 1108520, 1504420, 2106188, 2632735, 3008840, 4212376, 5265470, 10530940, 21061880]

約数ペア:

[(1, 21061880), (2, 10530940), (4, 5265470), (5, 4212376), (7, 3008840), (8, 2632735), (10, 2106188), (14, 1504420), (19, 1108520), (20, 1053094), (28, 752210), (35, 601768), (37, 569240), (38, 554260), (40, 526547), (56, 376105), (70, 300884), (74, 284620), (76, 277130), (95, 221704), (107, 196840), (133, 158360), (140, 150442), (148, 142310), (152, 138565), (185, 113848), (190, 110852), (214, 98420), (259, 81320), (266, 79180), (280, 75221), (296, 71155), (370, 56924), (380, 55426), (428, 49210), (518, 40660), (532, 39590), (535, 39368), (665, 31672), (703, 29960), (740, 28462), (749, 28120), (760, 27713), (856, 24605), (1036, 20330), (1064, 19795), (1070, 19684), (1295, 16264), (1330, 15836), (1406, 14980), (1480, 14231), (1498, 14060), (2033, 10360), (2072, 10165), (2140, 9842), (2590, 8132), (2660, 7918), (2812, 7490), (2996, 7030), (3515, 5992), (3745, 5624), (3959, 5320), (4066, 5180), (4280, 4921)]