21076020

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1$

素因数の和:454

約数の個数: 144

約数和(自身を含む): 74954880

約数和(自身を除く): 53878860

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 43, 45, 60, 63, 70, 84, 86, 90, 105, 126, 129, 140, 172, 180, 210, 215, 252, 258, 301, 315, 387, 389, 420, 430, 516, 602, 630, 645, 774, 778, 860, 903, 1167, 1204, 1260, 1290, 1505, 1548, 1556, 1806, 1935, 1945, 2334, 2580, 2709, 2723, 3010, 3501, 3612, 3870, 3890, 4515, 4668, 5418, 5446, 5835, 6020, 7002, 7740, 7780, 8169, 9030, 10836, 10892, 11670, 13545, 13615, 14004, 16338, 16727, 17505, 18060, 23340, 24507, 27090, 27230, 32676, 33454, 35010, 40845, 49014, 50181, 54180, 54460, 66908, 70020, 81690, 83635, 98028, 100362, 117089, 122535, 150543, 163380, 167270, 200724, 234178, 245070, 250905, 301086, 334540, 351267, 468356, 490140, 501810, 585445, 602172, 702534, 752715, 1003620, 1053801, 1170890, 1405068, 1505430, 1756335, 2107602, 2341780, 3010860, 3512670, 4215204, 5269005, 7025340, 10538010, 21076020]

約数ペア:

[(1, 21076020), (2, 10538010), (3, 7025340), (4, 5269005), (5, 4215204), (6, 3512670), (7, 3010860), (9, 2341780), (10, 2107602), (12, 1756335), (14, 1505430), (15, 1405068), (18, 1170890), (20, 1053801), (21, 1003620), (28, 752715), (30, 702534), (35, 602172), (36, 585445), (42, 501810), (43, 490140), (45, 468356), (60, 351267), (63, 334540), (70, 301086), (84, 250905), (86, 245070), (90, 234178), (105, 200724), (126, 167270), (129, 163380), (140, 150543), (172, 122535), (180, 117089), (210, 100362), (215, 98028), (252, 83635), (258, 81690), (301, 70020), (315, 66908), (387, 54460), (389, 54180), (420, 50181), (430, 49014), (516, 40845), (602, 35010), (630, 33454), (645, 32676), (774, 27230), (778, 27090), (860, 24507), (903, 23340), (1167, 18060), (1204, 17505), (1260, 16727), (1290, 16338), (1505, 14004), (1548, 13615), (1556, 13545), (1806, 11670), (1935, 10892), (1945, 10836), (2334, 9030), (2580, 8169), (2709, 7780), (2723, 7740), (3010, 7002), (3501, 6020), (3612, 5835), (3870, 5446), (3890, 5418), (4515, 4668)]