21444920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{139}}^1$

素因数の和:205

約数の個数: 128

約数和(自身を含む): 60480000

約数和(自身を除く): 39035080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 19, 20, 28, 29, 35, 38, 40, 56, 58, 70, 76, 95, 116, 133, 139, 140, 145, 152, 190, 203, 232, 266, 278, 280, 290, 380, 406, 532, 551, 556, 580, 665, 695, 760, 812, 973, 1015, 1064, 1102, 1112, 1160, 1330, 1390, 1624, 1946, 2030, 2204, 2641, 2660, 2755, 2780, 3857, 3892, 4031, 4060, 4408, 4865, 5282, 5320, 5510, 5560, 7714, 7784, 8062, 8120, 9730, 10564, 11020, 13205, 15428, 16124, 18487, 19285, 19460, 20155, 21128, 22040, 26410, 28217, 30856, 32248, 36974, 38570, 38920, 40310, 52820, 56434, 73948, 76589, 77140, 80620, 92435, 105640, 112868, 141085, 147896, 153178, 154280, 161240, 184870, 225736, 282170, 306356, 369740, 382945, 536123, 564340, 612712, 739480, 765890, 1072246, 1128680, 1531780, 2144492, 2680615, 3063560, 4288984, 5361230, 10722460, 21444920]

約数ペア:

[(1, 21444920), (2, 10722460), (4, 5361230), (5, 4288984), (7, 3063560), (8, 2680615), (10, 2144492), (14, 1531780), (19, 1128680), (20, 1072246), (28, 765890), (29, 739480), (35, 612712), (38, 564340), (40, 536123), (56, 382945), (58, 369740), (70, 306356), (76, 282170), (95, 225736), (116, 184870), (133, 161240), (139, 154280), (140, 153178), (145, 147896), (152, 141085), (190, 112868), (203, 105640), (232, 92435), (266, 80620), (278, 77140), (280, 76589), (290, 73948), (380, 56434), (406, 52820), (532, 40310), (551, 38920), (556, 38570), (580, 36974), (665, 32248), (695, 30856), (760, 28217), (812, 26410), (973, 22040), (1015, 21128), (1064, 20155), (1102, 19460), (1112, 19285), (1160, 18487), (1330, 16124), (1390, 15428), (1624, 13205), (1946, 11020), (2030, 10564), (2204, 9730), (2641, 8120), (2660, 8062), (2755, 7784), (2780, 7714), (3857, 5560), (3892, 5510), (4031, 5320), (4060, 5282), (4408, 4865)]