21918015

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{4093}}^1$

素因数の和:4128

約数の個数: 48

約数和(自身を含む): 45983808

約数和(自身を除く): 24065793

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 35, 45, 51, 63, 85, 105, 119, 153, 255, 315, 357, 595, 765, 1071, 1785, 4093, 5355, 12279, 20465, 28651, 36837, 61395, 69581, 85953, 143255, 184185, 208743, 257859, 347905, 429765, 487067, 626229, 1043715, 1289295, 1461201, 2435335, 3131145, 4383603, 7306005, 21918015]

約数ペア:

[(1, 21918015), (3, 7306005), (5, 4383603), (7, 3131145), (9, 2435335), (15, 1461201), (17, 1289295), (21, 1043715), (35, 626229), (45, 487067), (51, 429765), (63, 347905), (85, 257859), (105, 208743), (119, 184185), (153, 143255), (255, 85953), (315, 69581), (357, 61395), (595, 36837), (765, 28651), (1071, 20465), (1785, 12279), (4093, 5355)]