21436180

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{2969}}^1$

素因数の和:3016

約数の個数: 36

約数和(自身を含む): 47525940

約数和(自身を除く): 26089760

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 361, 380, 722, 1444, 1805, 2969, 3610, 5938, 7220, 11876, 14845, 29690, 56411, 59380, 112822, 225644, 282055, 564110, 1071809, 1128220, 2143618, 4287236, 5359045, 10718090, 21436180]

約数ペア:

[(1, 21436180), (2, 10718090), (4, 5359045), (5, 4287236), (10, 2143618), (19, 1128220), (20, 1071809), (38, 564110), (76, 282055), (95, 225644), (190, 112822), (361, 59380), (380, 56411), (722, 29690), (1444, 14845), (1805, 11876), (2969, 7220), (3610, 5938)]