21940155

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{383}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 40734720

約数和(自身を除く): 18794565

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 67, 95, 171, 201, 285, 335, 383, 603, 855, 1005, 1149, 1273, 1915, 3015, 3447, 3819, 5745, 6365, 7277, 11457, 17235, 19095, 21831, 25661, 36385, 57285, 65493, 76983, 109155, 128305, 230949, 327465, 384915, 487559, 1154745, 1462677, 2437795, 4388031, 7313385, 21940155]

約数ペア:

[(1, 21940155), (3, 7313385), (5, 4388031), (9, 2437795), (15, 1462677), (19, 1154745), (45, 487559), (57, 384915), (67, 327465), (95, 230949), (171, 128305), (201, 109155), (285, 76983), (335, 65493), (383, 57285), (603, 36385), (855, 25661), (1005, 21831), (1149, 19095), (1273, 17235), (1915, 11457), (3015, 7277), (3447, 6365), (3819, 5745)]