21416895

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{677}}^1$

素因数の和:744

約数の個数: 48

約数和(自身を含む): 40191840

約数和(自身を除く): 18774945

約数列:

[1, 3, 5, 9, 15, 19, 37, 45, 57, 95, 111, 171, 185, 285, 333, 555, 677, 703, 855, 1665, 2031, 2109, 3385, 3515, 6093, 6327, 10155, 10545, 12863, 25049, 30465, 31635, 38589, 64315, 75147, 115767, 125245, 192945, 225441, 375735, 475931, 578835, 1127205, 1427793, 2379655, 4283379, 7138965, 21416895]

約数ペア:

[(1, 21416895), (3, 7138965), (5, 4283379), (9, 2379655), (15, 1427793), (19, 1127205), (37, 578835), (45, 475931), (57, 375735), (95, 225441), (111, 192945), (171, 125245), (185, 115767), (285, 75147), (333, 64315), (555, 38589), (677, 31635), (703, 30465), (855, 25049), (1665, 12863), (2031, 10545), (2109, 10155), (3385, 6327), (3515, 6093)]