21905860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{3391}}^1$

素因数の和:3436

約数の個数: 48

約数和(自身を含む): 51287040

約数和(自身を除く): 29381180

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 170, 190, 323, 340, 380, 646, 1292, 1615, 3230, 3391, 6460, 6782, 13564, 16955, 33910, 57647, 64429, 67820, 115294, 128858, 230588, 257716, 288235, 322145, 576470, 644290, 1095293, 1152940, 1288580, 2190586, 4381172, 5476465, 10952930, 21905860]

約数ペア:

[(1, 21905860), (2, 10952930), (4, 5476465), (5, 4381172), (10, 2190586), (17, 1288580), (19, 1152940), (20, 1095293), (34, 644290), (38, 576470), (68, 322145), (76, 288235), (85, 257716), (95, 230588), (170, 128858), (190, 115294), (323, 67820), (340, 64429), (380, 57647), (646, 33910), (1292, 16955), (1615, 13564), (3230, 6782), (3391, 6460)]