19905165

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{2179}}^1$

素因数の和:2226

約数の個数: 48

約数和(自身を含む): 40809600

約数和(自身を除く): 20904435

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 45, 63, 87, 105, 145, 203, 261, 315, 435, 609, 1015, 1305, 1827, 2179, 3045, 6537, 9135, 10895, 15253, 19611, 32685, 45759, 63191, 76265, 98055, 137277, 189573, 228795, 315955, 442337, 568719, 686385, 947865, 1327011, 2211685, 2843595, 3981033, 6635055, 19905165]

約数ペア:

[(1, 19905165), (3, 6635055), (5, 3981033), (7, 2843595), (9, 2211685), (15, 1327011), (21, 947865), (29, 686385), (35, 568719), (45, 442337), (63, 315955), (87, 228795), (105, 189573), (145, 137277), (203, 98055), (261, 76265), (315, 63191), (435, 45759), (609, 32685), (1015, 19611), (1305, 15253), (1827, 10895), (2179, 9135), (3045, 6537)]