21741225

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{73}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 41952672

約数和(自身を除く): 20211447

約数列:

[1, 3, 5, 11, 15, 19, 25, 33, 55, 57, 73, 75, 95, 165, 209, 219, 275, 285, 361, 365, 475, 627, 803, 825, 1045, 1083, 1095, 1387, 1425, 1805, 1825, 2409, 3135, 3971, 4015, 4161, 5225, 5415, 5475, 6935, 9025, 11913, 12045, 15257, 15675, 19855, 20075, 20805, 26353, 27075, 34675, 45771, 59565, 60225, 76285, 79059, 99275, 104025, 131765, 228855, 289883, 297825, 381425, 395295, 658825, 869649, 1144275, 1449415, 1976475, 4348245, 7247075, 21741225]

約数ペア:

[(1, 21741225), (3, 7247075), (5, 4348245), (11, 1976475), (15, 1449415), (19, 1144275), (25, 869649), (33, 658825), (55, 395295), (57, 381425), (73, 297825), (75, 289883), (95, 228855), (165, 131765), (209, 104025), (219, 99275), (275, 79059), (285, 76285), (361, 60225), (365, 59565), (475, 45771), (627, 34675), (803, 27075), (825, 26353), (1045, 20805), (1083, 20075), (1095, 19855), (1387, 15675), (1425, 15257), (1805, 12045), (1825, 11913), (2409, 9025), (3135, 6935), (3971, 5475), (4015, 5415), (4161, 5225)]