21431220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{21011}}^1$

素因数の和:21040

約数の個数: 48

約数和(自身を含む): 63540288

約数和(自身を除く): 42109068

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 51, 60, 68, 85, 102, 170, 204, 255, 340, 510, 1020, 21011, 42022, 63033, 84044, 105055, 126066, 210110, 252132, 315165, 357187, 420220, 630330, 714374, 1071561, 1260660, 1428748, 1785935, 2143122, 3571870, 4286244, 5357805, 7143740, 10715610, 21431220]

約数ペア:

[(1, 21431220), (2, 10715610), (3, 7143740), (4, 5357805), (5, 4286244), (6, 3571870), (10, 2143122), (12, 1785935), (15, 1428748), (17, 1260660), (20, 1071561), (30, 714374), (34, 630330), (51, 420220), (60, 357187), (68, 315165), (85, 252132), (102, 210110), (170, 126066), (204, 105055), (255, 84044), (340, 63033), (510, 42022), (1020, 21011)]