21518685

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1223}}^1$

素因数の和:1274

約数の個数: 48

約数和(自身を含む): 41243904

約数和(自身を除く): 19725219

約数列:

[1, 3, 5, 9, 15, 17, 23, 45, 51, 69, 85, 115, 153, 207, 255, 345, 391, 765, 1035, 1173, 1223, 1955, 3519, 3669, 5865, 6115, 11007, 17595, 18345, 20791, 28129, 55035, 62373, 84387, 103955, 140645, 187119, 253161, 311865, 421935, 478193, 935595, 1265805, 1434579, 2390965, 4303737, 7172895, 21518685]

約数ペア:

[(1, 21518685), (3, 7172895), (5, 4303737), (9, 2390965), (15, 1434579), (17, 1265805), (23, 935595), (45, 478193), (51, 421935), (69, 311865), (85, 253161), (115, 187119), (153, 140645), (207, 103955), (255, 84387), (345, 62373), (391, 55035), (765, 28129), (1035, 20791), (1173, 18345), (1223, 17595), (1955, 11007), (3519, 6115), (3669, 5865)]