21101220

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16747}}^1$

素因数の和:16769

約数の個数: 72

約数和(自身を含む): 73155264

約数和(自身を除く): 52054044

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, 16747, 33494, 50241, 66988, 83735, 100482, 117229, 150723, 167470, 200964, 234458, 251205, 301446, 334940, 351687, 468916, 502410, 586145, 602892, 703374, 753615, 1004820, 1055061, 1172290, 1406748, 1507230, 1758435, 2110122, 2344580, 3014460, 3516870, 4220244, 5275305, 7033740, 10550610, 21101220]

約数ペア:

[(1, 21101220), (2, 10550610), (3, 7033740), (4, 5275305), (5, 4220244), (6, 3516870), (7, 3014460), (9, 2344580), (10, 2110122), (12, 1758435), (14, 1507230), (15, 1406748), (18, 1172290), (20, 1055061), (21, 1004820), (28, 753615), (30, 703374), (35, 602892), (36, 586145), (42, 502410), (45, 468916), (60, 351687), (63, 334940), (70, 301446), (84, 251205), (90, 234458), (105, 200964), (126, 167470), (140, 150723), (180, 117229), (210, 100482), (252, 83735), (315, 66988), (420, 50241), (630, 33494), (1260, 16747)]