21042525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{149}}^1\times {\mathrm{269}}^1$

素因数の和:438

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 19133475

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 105, 149, 175, 269, 447, 525, 745, 807, 1043, 1345, 1883, 2235, 3129, 3725, 4035, 5215, 5649, 6725, 9415, 11175, 15645, 20175, 26075, 28245, 40081, 47075, 78225, 120243, 141225, 200405, 280567, 601215, 841701, 1002025, 1402835, 3006075, 4208505, 7014175, 21042525]

約数ペア:

[(1, 21042525), (3, 7014175), (5, 4208505), (7, 3006075), (15, 1402835), (21, 1002025), (25, 841701), (35, 601215), (75, 280567), (105, 200405), (149, 141225), (175, 120243), (269, 78225), (447, 47075), (525, 40081), (745, 28245), (807, 26075), (1043, 20175), (1345, 15645), (1883, 11175), (2235, 9415), (3129, 6725), (3725, 5649), (4035, 5215)]