21708225

素因数分解:

$3^2\times 5^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{179}}^1$

素因数の和:220

約数の個数: 108

約数和(自身を含む): 49617360

約数和(自身を除く): 27909135

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 25, 33, 35, 45, 49, 55, 63, 75, 77, 99, 105, 147, 165, 175, 179, 225, 231, 245, 275, 315, 385, 441, 495, 525, 537, 539, 693, 735, 825, 895, 1155, 1225, 1253, 1575, 1611, 1617, 1925, 1969, 2205, 2475, 2685, 2695, 3465, 3675, 3759, 4475, 4851, 5775, 5907, 6265, 8055, 8085, 8771, 9845, 11025, 11277, 13425, 13475, 13783, 17325, 17721, 18795, 24255, 26313, 29535, 31325, 40275, 40425, 41349, 43855, 49225, 56385, 68915, 78939, 88605, 93975, 96481, 121275, 124047, 131565, 147675, 206745, 219275, 281925, 289443, 344575, 394695, 443025, 482405, 620235, 657825, 868329, 1033725, 1447215, 1973475, 2412025, 3101175, 4341645, 7236075, 21708225]

約数ペア:

[(1, 21708225), (3, 7236075), (5, 4341645), (7, 3101175), (9, 2412025), (11, 1973475), (15, 1447215), (21, 1033725), (25, 868329), (33, 657825), (35, 620235), (45, 482405), (49, 443025), (55, 394695), (63, 344575), (75, 289443), (77, 281925), (99, 219275), (105, 206745), (147, 147675), (165, 131565), (175, 124047), (179, 121275), (225, 96481), (231, 93975), (245, 88605), (275, 78939), (315, 68915), (385, 56385), (441, 49225), (495, 43855), (525, 41349), (537, 40425), (539, 40275), (693, 31325), (735, 29535), (825, 26313), (895, 24255), (1155, 18795), (1225, 17721), (1253, 17325), (1575, 13783), (1611, 13475), (1617, 13425), (1925, 11277), (1969, 11025), (2205, 9845), (2475, 8771), (2685, 8085), (2695, 8055), (3465, 6265), (3675, 5907), (3759, 5775), (4475, 4851)]