21730527

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^3\times {\mathrm{157}}^1$

素因数の和:209

約数の個数: 48

約数和(自身を含む): 39108160

約数和(自身を除く): 17377633

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 157, 169, 273, 471, 507, 819, 1099, 1183, 1413, 1521, 2041, 2197, 3297, 3549, 6123, 6591, 9891, 10647, 14287, 15379, 18369, 19773, 26533, 42861, 46137, 79599, 128583, 138411, 185731, 238797, 344929, 557193, 1034787, 1671579, 2414503, 3104361, 7243509, 21730527]

約数ペア:

[(1, 21730527), (3, 7243509), (7, 3104361), (9, 2414503), (13, 1671579), (21, 1034787), (39, 557193), (63, 344929), (91, 238797), (117, 185731), (157, 138411), (169, 128583), (273, 79599), (471, 46137), (507, 42861), (819, 26533), (1099, 19773), (1183, 18369), (1413, 15379), (1521, 14287), (2041, 10647), (2197, 9891), (3297, 6591), (3549, 6123)]