21685185

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^2\times {\mathrm{191}}^1$

素因数の和:263

約数の個数: 48

約数和(自身を含む): 40135680

約数和(自身を除く): 18450495

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 191, 261, 435, 573, 783, 841, 955, 1305, 1719, 2523, 2865, 3915, 4205, 5157, 5539, 7569, 8595, 12615, 16617, 22707, 25785, 27695, 37845, 49851, 83085, 113535, 149553, 160631, 249255, 481893, 747765, 803155, 1445679, 2409465, 4337037, 7228395, 21685185]

約数ペア:

[(1, 21685185), (3, 7228395), (5, 4337037), (9, 2409465), (15, 1445679), (27, 803155), (29, 747765), (45, 481893), (87, 249255), (135, 160631), (145, 149553), (191, 113535), (261, 83085), (435, 49851), (573, 37845), (783, 27695), (841, 25785), (955, 22707), (1305, 16617), (1719, 12615), (2523, 8595), (2865, 7569), (3915, 5539), (4205, 5157)]