21289095

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{5087}}^1$

素因数の和:5132

約数の個数: 32

約数和(自身を含む): 39075840

約数和(自身を除く): 17786745

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 93, 135, 155, 279, 465, 837, 1395, 4185, 5087, 15261, 25435, 45783, 76305, 137349, 157697, 228915, 473091, 686745, 788485, 1419273, 2365455, 4257819, 7096365, 21289095]

約数ペア:

[(1, 21289095), (3, 7096365), (5, 4257819), (9, 2365455), (15, 1419273), (27, 788485), (31, 686745), (45, 473091), (93, 228915), (135, 157697), (155, 137349), (279, 76305), (465, 45783), (837, 25435), (1395, 15261), (4185, 5087)]