21719565

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{191}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 45646848

約数和(自身を除く): 23927283

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 191, 285, 315, 361, 399, 573, 665, 855, 955, 1083, 1197, 1337, 1719, 1805, 1995, 2527, 2865, 3249, 3629, 4011, 5415, 5985, 6685, 7581, 8595, 10887, 12033, 12635, 16245, 18145, 20055, 22743, 25403, 32661, 37905, 54435, 60165, 68951, 76209, 113715, 127015, 163305, 206853, 228627, 344755, 381045, 482657, 620559, 1034265, 1143135, 1447971, 2413285, 3102795, 4343913, 7239855, 21719565]

約数ペア:

[(1, 21719565), (3, 7239855), (5, 4343913), (7, 3102795), (9, 2413285), (15, 1447971), (19, 1143135), (21, 1034265), (35, 620559), (45, 482657), (57, 381045), (63, 344755), (95, 228627), (105, 206853), (133, 163305), (171, 127015), (191, 113715), (285, 76209), (315, 68951), (361, 60165), (399, 54435), (573, 37905), (665, 32661), (855, 25403), (955, 22743), (1083, 20055), (1197, 18145), (1337, 16245), (1719, 12635), (1805, 12033), (1995, 10887), (2527, 8595), (2865, 7581), (3249, 6685), (3629, 5985), (4011, 5415)]