21518805

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{601}}^1$

素因数の和:658

約数の個数: 64

約数和(自身を含む): 44384256

約数和(自身を除く): 22865451

約数列:

[1, 3, 5, 7, 11, 15, 21, 31, 33, 35, 55, 77, 93, 105, 155, 165, 217, 231, 341, 385, 465, 601, 651, 1023, 1085, 1155, 1705, 1803, 2387, 3005, 3255, 4207, 5115, 6611, 7161, 9015, 11935, 12621, 18631, 19833, 21035, 33055, 35805, 46277, 55893, 63105, 93155, 99165, 130417, 138831, 204941, 231385, 279465, 391251, 614823, 652085, 694155, 1024705, 1434587, 1956255, 3074115, 4303761, 7172935, 21518805]

約数ペア:

[(1, 21518805), (3, 7172935), (5, 4303761), (7, 3074115), (11, 1956255), (15, 1434587), (21, 1024705), (31, 694155), (33, 652085), (35, 614823), (55, 391251), (77, 279465), (93, 231385), (105, 204941), (155, 138831), (165, 130417), (217, 99165), (231, 93155), (341, 63105), (385, 55893), (465, 46277), (601, 35805), (651, 33055), (1023, 21035), (1085, 19833), (1155, 18631), (1705, 12621), (1803, 11935), (2387, 9015), (3005, 7161), (3255, 6611), (4207, 5115)]