21456540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17029}}^1$

素因数の和:17051

約数の個数: 72

約数和(自身を含む): 74387040

約数和(自身を除く): 52930500

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 17029, 34058, 51087, 68116, 85145, 102174, 119203, 153261, 170290, 204348, 238406, 255435, 306522, 340580, 357609, 476812, 510870, 596015, 613044, 715218, 766305, 1021740, 1072827, 1192030, 1430436, 1532610, 1788045, 2145654, 2384060, 3065220, 3576090, 4291308, 5364135, 7152180, 10728270, 21456540]

約数ペア:

[(1, 21456540), (2, 10728270), (3, 7152180), (4, 5364135), (5, 4291308), (6, 3576090), (7, 3065220), (9, 2384060), (10, 2145654), (12, 1788045), (14, 1532610), (15, 1430436), (18, 1192030), (20, 1072827), (21, 1021740), (28, 766305), (30, 715218), (35, 613044), (36, 596015), (42, 510870), (45, 476812), (60, 357609), (63, 340580), (70, 306522), (84, 255435), (90, 238406), (105, 204348), (126, 170290), (140, 153261), (180, 119203), (210, 102174), (252, 85145), (315, 68116), (420, 51087), (630, 34058), (1260, 17029)]