21921075

素因数分解:

$3^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{521}}^1$

素因数の和:565

約数の個数: 72

約数和(自身を含む): 45439056

約数和(自身を除く): 23517981

約数列:

[1, 3, 5, 9, 11, 15, 17, 25, 33, 45, 51, 55, 75, 85, 99, 153, 165, 187, 225, 255, 275, 425, 495, 521, 561, 765, 825, 935, 1275, 1563, 1683, 2475, 2605, 2805, 3825, 4675, 4689, 5731, 7815, 8415, 8857, 13025, 14025, 17193, 23445, 26571, 28655, 39075, 42075, 44285, 51579, 79713, 85965, 97427, 117225, 132855, 143275, 221425, 257895, 292281, 398565, 429825, 487135, 664275, 876843, 1289475, 1461405, 1992825, 2435675, 4384215, 7307025, 21921075]

約数ペア:

[(1, 21921075), (3, 7307025), (5, 4384215), (9, 2435675), (11, 1992825), (15, 1461405), (17, 1289475), (25, 876843), (33, 664275), (45, 487135), (51, 429825), (55, 398565), (75, 292281), (85, 257895), (99, 221425), (153, 143275), (165, 132855), (187, 117225), (225, 97427), (255, 85965), (275, 79713), (425, 51579), (495, 44285), (521, 42075), (561, 39075), (765, 28655), (825, 26571), (935, 23445), (1275, 17193), (1563, 14025), (1683, 13025), (2475, 8857), (2605, 8415), (2805, 7815), (3825, 5731), (4675, 4689)]