21281500

素因数分解:

$2^2\times 5^3\times {\mathrm{31}}^1\times {\mathrm{1373}}^1$

素因数の和:1423

約数の個数: 48

約数和(自身を含む): 48013056

約数和(自身を除く): 26731556

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 125, 155, 250, 310, 500, 620, 775, 1373, 1550, 2746, 3100, 3875, 5492, 6865, 7750, 13730, 15500, 27460, 34325, 42563, 68650, 85126, 137300, 170252, 171625, 212815, 343250, 425630, 686500, 851260, 1064075, 2128150, 4256300, 5320375, 10640750, 21281500]

約数ペア:

[(1, 21281500), (2, 10640750), (4, 5320375), (5, 4256300), (10, 2128150), (20, 1064075), (25, 851260), (31, 686500), (50, 425630), (62, 343250), (100, 212815), (124, 171625), (125, 170252), (155, 137300), (250, 85126), (310, 68650), (500, 42563), (620, 34325), (775, 27460), (1373, 15500), (1550, 13730), (2746, 7750), (3100, 6865), (3875, 5492)]