21251615

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{191}}^1$

素因数の和:248

約数の個数: 48

約数和(自身を含む): 33951744

約数和(自身を除く): 12700129

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 187, 191, 289, 385, 595, 935, 955, 1309, 1337, 1445, 2023, 2101, 3179, 3247, 6545, 6685, 10115, 10505, 14707, 15895, 16235, 22253, 22729, 35717, 55199, 73535, 111265, 113645, 178585, 250019, 275995, 386393, 607189, 1250095, 1931965, 3035945, 4250323, 21251615]

約数ペア:

[(1, 21251615), (5, 4250323), (7, 3035945), (11, 1931965), (17, 1250095), (35, 607189), (55, 386393), (77, 275995), (85, 250019), (119, 178585), (187, 113645), (191, 111265), (289, 73535), (385, 55199), (595, 35717), (935, 22729), (955, 22253), (1309, 16235), (1337, 15895), (1445, 14707), (2023, 10505), (2101, 10115), (3179, 6685), (3247, 6545)]