21142740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{29}}^2\times {\mathrm{419}}^1$

素因数の和:489

約数の個数: 72

約数和(自身を含む): 61457760

約数和(自身を除く): 40315020

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 29, 30, 58, 60, 87, 116, 145, 174, 290, 348, 419, 435, 580, 838, 841, 870, 1257, 1676, 1682, 1740, 2095, 2514, 2523, 3364, 4190, 4205, 5028, 5046, 6285, 8380, 8410, 10092, 12151, 12570, 12615, 16820, 24302, 25140, 25230, 36453, 48604, 50460, 60755, 72906, 121510, 145812, 182265, 243020, 352379, 364530, 704758, 729060, 1057137, 1409516, 1761895, 2114274, 3523790, 4228548, 5285685, 7047580, 10571370, 21142740]

約数ペア:

[(1, 21142740), (2, 10571370), (3, 7047580), (4, 5285685), (5, 4228548), (6, 3523790), (10, 2114274), (12, 1761895), (15, 1409516), (20, 1057137), (29, 729060), (30, 704758), (58, 364530), (60, 352379), (87, 243020), (116, 182265), (145, 145812), (174, 121510), (290, 72906), (348, 60755), (419, 50460), (435, 48604), (580, 36453), (838, 25230), (841, 25140), (870, 24302), (1257, 16820), (1676, 12615), (1682, 12570), (1740, 12151), (2095, 10092), (2514, 8410), (2523, 8380), (3364, 6285), (4190, 5046), (4205, 5028)]