21208638

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^2\times {\mathrm{131}}^1\times {\mathrm{223}}^1$

素因数の和:381

約数の個数: 48

約数和(自身を含む): 47190528

約数和(自身を除く): 25981890

約数列:

[1, 2, 3, 6, 11, 22, 33, 66, 121, 131, 223, 242, 262, 363, 393, 446, 669, 726, 786, 1338, 1441, 2453, 2882, 4323, 4906, 7359, 8646, 14718, 15851, 26983, 29213, 31702, 47553, 53966, 58426, 80949, 87639, 95106, 161898, 175278, 321343, 642686, 964029, 1928058, 3534773, 7069546, 10604319, 21208638]

約数ペア:

[(1, 21208638), (2, 10604319), (3, 7069546), (6, 3534773), (11, 1928058), (22, 964029), (33, 642686), (66, 321343), (121, 175278), (131, 161898), (223, 95106), (242, 87639), (262, 80949), (363, 58426), (393, 53966), (446, 47553), (669, 31702), (726, 29213), (786, 26983), (1338, 15851), (1441, 14718), (2453, 8646), (2882, 7359), (4323, 4906)]