20755840

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{113}}^1$

素因数の和:180

約数の個数: 128

約数和(自身を含む): 58605120

約数和(自身を除く): 37849280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 41, 56, 64, 70, 80, 82, 112, 113, 128, 140, 160, 164, 205, 224, 226, 280, 287, 320, 328, 410, 448, 452, 560, 565, 574, 640, 656, 791, 820, 896, 904, 1120, 1130, 1148, 1312, 1435, 1582, 1640, 1808, 2240, 2260, 2296, 2624, 2870, 3164, 3280, 3616, 3955, 4480, 4520, 4592, 4633, 5248, 5740, 6328, 6560, 7232, 7910, 9040, 9184, 9266, 11480, 12656, 13120, 14464, 15820, 18080, 18368, 18532, 22960, 23165, 25312, 26240, 31640, 32431, 36160, 36736, 37064, 45920, 46330, 50624, 63280, 64862, 72320, 74128, 91840, 92660, 101248, 126560, 129724, 148256, 162155, 183680, 185320, 253120, 259448, 296512, 324310, 370640, 506240, 518896, 593024, 648620, 741280, 1037792, 1297240, 1482560, 2075584, 2594480, 2965120, 4151168, 5188960, 10377920, 20755840]

約数ペア:

[(1, 20755840), (2, 10377920), (4, 5188960), (5, 4151168), (7, 2965120), (8, 2594480), (10, 2075584), (14, 1482560), (16, 1297240), (20, 1037792), (28, 741280), (32, 648620), (35, 593024), (40, 518896), (41, 506240), (56, 370640), (64, 324310), (70, 296512), (80, 259448), (82, 253120), (112, 185320), (113, 183680), (128, 162155), (140, 148256), (160, 129724), (164, 126560), (205, 101248), (224, 92660), (226, 91840), (280, 74128), (287, 72320), (320, 64862), (328, 63280), (410, 50624), (448, 46330), (452, 45920), (560, 37064), (565, 36736), (574, 36160), (640, 32431), (656, 31640), (791, 26240), (820, 25312), (896, 23165), (904, 22960), (1120, 18532), (1130, 18368), (1148, 18080), (1312, 15820), (1435, 14464), (1582, 13120), (1640, 12656), (1808, 11480), (2240, 9266), (2260, 9184), (2296, 9040), (2624, 7910), (2870, 7232), (3164, 6560), (3280, 6328), (3616, 5740), (3955, 5248), (4480, 4633), (4520, 4592)]