21380016

素因数分解:

$2^4\times 3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:251

約数の個数: 160

約数和(自身を含む): 70709760

約数和(自身を除く): 49329744

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 17, 19, 21, 24, 28, 34, 38, 42, 48, 51, 56, 57, 68, 76, 84, 102, 112, 114, 119, 133, 136, 152, 168, 197, 204, 228, 238, 266, 272, 304, 323, 336, 357, 394, 399, 408, 456, 476, 532, 591, 646, 714, 788, 798, 816, 912, 952, 969, 1064, 1182, 1292, 1379, 1428, 1576, 1596, 1904, 1938, 2128, 2261, 2364, 2584, 2758, 2856, 3152, 3192, 3349, 3743, 3876, 4137, 4522, 4728, 5168, 5516, 5712, 6384, 6698, 6783, 7486, 7752, 8274, 9044, 9456, 10047, 11032, 11229, 13396, 13566, 14972, 15504, 16548, 18088, 20094, 22064, 22458, 23443, 26201, 26792, 27132, 29944, 33096, 36176, 40188, 44916, 46886, 52402, 53584, 54264, 59888, 63631, 66192, 70329, 78603, 80376, 89832, 93772, 104804, 108528, 127262, 140658, 157206, 160752, 179664, 187544, 190893, 209608, 254524, 281316, 314412, 375088, 381786, 419216, 445417, 509048, 562632, 628824, 763572, 890834, 1018096, 1125264, 1257648, 1336251, 1527144, 1781668, 2672502, 3054288, 3563336, 5345004, 7126672, 10690008, 21380016]

約数ペア:

[(1, 21380016), (2, 10690008), (3, 7126672), (4, 5345004), (6, 3563336), (7, 3054288), (8, 2672502), (12, 1781668), (14, 1527144), (16, 1336251), (17, 1257648), (19, 1125264), (21, 1018096), (24, 890834), (28, 763572), (34, 628824), (38, 562632), (42, 509048), (48, 445417), (51, 419216), (56, 381786), (57, 375088), (68, 314412), (76, 281316), (84, 254524), (102, 209608), (112, 190893), (114, 187544), (119, 179664), (133, 160752), (136, 157206), (152, 140658), (168, 127262), (197, 108528), (204, 104804), (228, 93772), (238, 89832), (266, 80376), (272, 78603), (304, 70329), (323, 66192), (336, 63631), (357, 59888), (394, 54264), (399, 53584), (408, 52402), (456, 46886), (476, 44916), (532, 40188), (591, 36176), (646, 33096), (714, 29944), (788, 27132), (798, 26792), (816, 26201), (912, 23443), (952, 22458), (969, 22064), (1064, 20094), (1182, 18088), (1292, 16548), (1379, 15504), (1428, 14972), (1576, 13566), (1596, 13396), (1904, 11229), (1938, 11032), (2128, 10047), (2261, 9456), (2364, 9044), (2584, 8274), (2758, 7752), (2856, 7486), (3152, 6783), (3192, 6698), (3349, 6384), (3743, 5712), (3876, 5516), (4137, 5168), (4522, 4728)]