21686980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{263}}^1$

素因数の和:329

約数の個数: 96

約数和(自身を含む): 56770560

約数和(自身を除く): 35083580

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 31, 35, 38, 62, 70, 76, 95, 124, 133, 140, 155, 190, 217, 263, 266, 310, 380, 434, 526, 532, 589, 620, 665, 868, 1052, 1085, 1178, 1315, 1330, 1841, 2170, 2356, 2630, 2660, 2945, 3682, 4123, 4340, 4997, 5260, 5890, 7364, 8153, 8246, 9205, 9994, 11780, 16306, 16492, 18410, 19988, 20615, 24985, 32612, 34979, 36820, 40765, 41230, 49970, 57071, 69958, 81530, 82460, 99940, 114142, 139916, 154907, 163060, 174895, 228284, 285355, 309814, 349790, 570710, 619628, 699580, 774535, 1084349, 1141420, 1549070, 2168698, 3098140, 4337396, 5421745, 10843490, 21686980]

約数ペア:

[(1, 21686980), (2, 10843490), (4, 5421745), (5, 4337396), (7, 3098140), (10, 2168698), (14, 1549070), (19, 1141420), (20, 1084349), (28, 774535), (31, 699580), (35, 619628), (38, 570710), (62, 349790), (70, 309814), (76, 285355), (95, 228284), (124, 174895), (133, 163060), (140, 154907), (155, 139916), (190, 114142), (217, 99940), (263, 82460), (266, 81530), (310, 69958), (380, 57071), (434, 49970), (526, 41230), (532, 40765), (589, 36820), (620, 34979), (665, 32612), (868, 24985), (1052, 20615), (1085, 19988), (1178, 18410), (1315, 16492), (1330, 16306), (1841, 11780), (2170, 9994), (2356, 9205), (2630, 8246), (2660, 8153), (2945, 7364), (3682, 5890), (4123, 5260), (4340, 4997)]