21151908

素因数分解:

$2^2\times 3^3\times {\mathrm{139}}^1\times {\mathrm{1409}}^1$

素因数の和:1561

約数の個数: 48

約数和(自身を含む): 55272000

約数和(自身を除く): 34120092

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 139, 278, 417, 556, 834, 1251, 1409, 1668, 2502, 2818, 3753, 4227, 5004, 5636, 7506, 8454, 12681, 15012, 16908, 25362, 38043, 50724, 76086, 152172, 195851, 391702, 587553, 783404, 1175106, 1762659, 2350212, 3525318, 5287977, 7050636, 10575954, 21151908]

約数ペア:

[(1, 21151908), (2, 10575954), (3, 7050636), (4, 5287977), (6, 3525318), (9, 2350212), (12, 1762659), (18, 1175106), (27, 783404), (36, 587553), (54, 391702), (108, 195851), (139, 152172), (278, 76086), (417, 50724), (556, 38043), (834, 25362), (1251, 16908), (1409, 15012), (1668, 12681), (2502, 8454), (2818, 7506), (3753, 5636), (4227, 5004)]