21405160

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{163}}^1$

素因数の和:255

約数の個数: 96

約数和(自身を含む): 57209760

約数和(自身を除く): 35804600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 67, 70, 98, 134, 140, 163, 196, 245, 268, 280, 326, 335, 392, 469, 490, 536, 652, 670, 815, 938, 980, 1141, 1304, 1340, 1630, 1876, 1960, 2282, 2345, 2680, 3260, 3283, 3752, 4564, 4690, 5705, 6520, 6566, 7987, 9128, 9380, 10921, 11410, 13132, 15974, 16415, 18760, 21842, 22820, 26264, 31948, 32830, 39935, 43684, 45640, 54605, 63896, 65660, 76447, 79870, 87368, 109210, 131320, 152894, 159740, 218420, 305788, 319480, 382235, 436840, 535129, 611576, 764470, 1070258, 1528940, 2140516, 2675645, 3057880, 4281032, 5351290, 10702580, 21405160]

約数ペア:

[(1, 21405160), (2, 10702580), (4, 5351290), (5, 4281032), (7, 3057880), (8, 2675645), (10, 2140516), (14, 1528940), (20, 1070258), (28, 764470), (35, 611576), (40, 535129), (49, 436840), (56, 382235), (67, 319480), (70, 305788), (98, 218420), (134, 159740), (140, 152894), (163, 131320), (196, 109210), (245, 87368), (268, 79870), (280, 76447), (326, 65660), (335, 63896), (392, 54605), (469, 45640), (490, 43684), (536, 39935), (652, 32830), (670, 31948), (815, 26264), (938, 22820), (980, 21842), (1141, 18760), (1304, 16415), (1340, 15974), (1630, 13132), (1876, 11410), (1960, 10921), (2282, 9380), (2345, 9128), (2680, 7987), (3260, 6566), (3283, 6520), (3752, 5705), (4564, 4690)]