21420595

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 32749920

約数和(自身を除く): 11329325

約数列:

[1, 5, 7, 17, 35, 37, 49, 85, 119, 139, 185, 245, 259, 595, 629, 695, 833, 973, 1295, 1813, 2363, 3145, 4165, 4403, 4865, 5143, 6811, 9065, 11815, 16541, 22015, 25715, 30821, 34055, 36001, 82705, 87431, 115787, 154105, 180005, 252007, 437155, 578935, 612017, 1260035, 3060085, 4284119, 21420595]

約数ペア:

[(1, 21420595), (5, 4284119), (7, 3060085), (17, 1260035), (35, 612017), (37, 578935), (49, 437155), (85, 252007), (119, 180005), (139, 154105), (185, 115787), (245, 87431), (259, 82705), (595, 36001), (629, 34055), (695, 30821), (833, 25715), (973, 22015), (1295, 16541), (1813, 11815), (2363, 9065), (3145, 6811), (4165, 5143), (4403, 4865)]