21742980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{51769}}^1$

素因数の和:51788

約数の個数: 48

約数和(自身を含む): 69578880

約数和(自身を除く): 47835900

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 51769, 103538, 155307, 207076, 258845, 310614, 362383, 517690, 621228, 724766, 776535, 1035380, 1087149, 1449532, 1553070, 1811915, 2174298, 3106140, 3623830, 4348596, 5435745, 7247660, 10871490, 21742980]

約数ペア:

[(1, 21742980), (2, 10871490), (3, 7247660), (4, 5435745), (5, 4348596), (6, 3623830), (7, 3106140), (10, 2174298), (12, 1811915), (14, 1553070), (15, 1449532), (20, 1087149), (21, 1035380), (28, 776535), (30, 724766), (35, 621228), (42, 517690), (60, 362383), (70, 310614), (84, 258845), (105, 207076), (140, 155307), (210, 103538), (420, 51769)]