21040416

素因数分解:

$2^5\times 3^2\times {\mathrm{43}}^1\times {\mathrm{1699}}^1$

素因数の和:1758

約数の個数: 72

約数和(自身を含む): 61261200

約数和(自身を除く): 40220784

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 43, 48, 72, 86, 96, 129, 144, 172, 258, 288, 344, 387, 516, 688, 774, 1032, 1376, 1548, 1699, 2064, 3096, 3398, 4128, 5097, 6192, 6796, 10194, 12384, 13592, 15291, 20388, 27184, 30582, 40776, 54368, 61164, 73057, 81552, 122328, 146114, 163104, 219171, 244656, 292228, 438342, 489312, 584456, 657513, 876684, 1168912, 1315026, 1753368, 2337824, 2630052, 3506736, 5260104, 7013472, 10520208, 21040416]

約数ペア:

[(1, 21040416), (2, 10520208), (3, 7013472), (4, 5260104), (6, 3506736), (8, 2630052), (9, 2337824), (12, 1753368), (16, 1315026), (18, 1168912), (24, 876684), (32, 657513), (36, 584456), (43, 489312), (48, 438342), (72, 292228), (86, 244656), (96, 219171), (129, 163104), (144, 146114), (172, 122328), (258, 81552), (288, 73057), (344, 61164), (387, 54368), (516, 40776), (688, 30582), (774, 27184), (1032, 20388), (1376, 15291), (1548, 13592), (1699, 12384), (2064, 10194), (3096, 6796), (3398, 6192), (4128, 5097)]