21203420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{151}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 55157760

約数和(自身を除く): 33954340

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 59, 68, 70, 85, 118, 119, 140, 151, 170, 236, 238, 295, 302, 340, 413, 476, 590, 595, 604, 755, 826, 1003, 1057, 1180, 1190, 1510, 1652, 2006, 2065, 2114, 2380, 2567, 3020, 4012, 4130, 4228, 5015, 5134, 5285, 7021, 8260, 8909, 10030, 10268, 10570, 12835, 14042, 17818, 17969, 20060, 21140, 25670, 28084, 35105, 35636, 35938, 44545, 51340, 62363, 70210, 71876, 89090, 89845, 124726, 140420, 151453, 178180, 179690, 249452, 302906, 311815, 359380, 605812, 623630, 757265, 1060171, 1247260, 1514530, 2120342, 3029060, 4240684, 5300855, 10601710, 21203420]

約数ペア:

[(1, 21203420), (2, 10601710), (4, 5300855), (5, 4240684), (7, 3029060), (10, 2120342), (14, 1514530), (17, 1247260), (20, 1060171), (28, 757265), (34, 623630), (35, 605812), (59, 359380), (68, 311815), (70, 302906), (85, 249452), (118, 179690), (119, 178180), (140, 151453), (151, 140420), (170, 124726), (236, 89845), (238, 89090), (295, 71876), (302, 70210), (340, 62363), (413, 51340), (476, 44545), (590, 35938), (595, 35636), (604, 35105), (755, 28084), (826, 25670), (1003, 21140), (1057, 20060), (1180, 17969), (1190, 17818), (1510, 14042), (1652, 12835), (2006, 10570), (2065, 10268), (2114, 10030), (2380, 8909), (2567, 8260), (3020, 7021), (4012, 5285), (4130, 5134), (4228, 5015)]