21638205

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{5527}}^1$

素因数の和:5570

約数の個数: 32

約数和(自身を含む): 39801600

約数和(自身を除く): 18163395

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 135, 145, 261, 435, 783, 1305, 3915, 5527, 16581, 27635, 49743, 82905, 149229, 160283, 248715, 480849, 746145, 801415, 1442547, 2404245, 4327641, 7212735, 21638205]

約数ペア:

[(1, 21638205), (3, 7212735), (5, 4327641), (9, 2404245), (15, 1442547), (27, 801415), (29, 746145), (45, 480849), (87, 248715), (135, 160283), (145, 149229), (261, 82905), (435, 49743), (783, 27635), (1305, 16581), (3915, 5527)]