21443025

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:226

約数の個数: 48

約数和(自身を含む): 37209920

約数和(自身を除く): 15766895

約数列:

[1, 3, 5, 15, 25, 43, 61, 75, 109, 129, 183, 215, 305, 327, 545, 645, 915, 1075, 1525, 1635, 2623, 2725, 3225, 4575, 4687, 6649, 7869, 8175, 13115, 14061, 19947, 23435, 33245, 39345, 65575, 70305, 99735, 117175, 166225, 196725, 285907, 351525, 498675, 857721, 1429535, 4288605, 7147675, 21443025]

約数ペア:

[(1, 21443025), (3, 7147675), (5, 4288605), (15, 1429535), (25, 857721), (43, 498675), (61, 351525), (75, 285907), (109, 196725), (129, 166225), (183, 117175), (215, 99735), (305, 70305), (327, 65575), (545, 39345), (645, 33245), (915, 23435), (1075, 19947), (1525, 14061), (1635, 13115), (2623, 8175), (2725, 7869), (3225, 6649), (4575, 4687)]