19877900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{389}}^1$

素因数の和:483

約数の個数: 72

約数和(自身を含む): 50100960

約数和(自身を除く): 30223060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 25, 28, 35, 50, 70, 73, 100, 140, 146, 175, 292, 350, 365, 389, 511, 700, 730, 778, 1022, 1460, 1556, 1825, 1945, 2044, 2555, 2723, 3650, 3890, 5110, 5446, 7300, 7780, 9725, 10220, 10892, 12775, 13615, 19450, 25550, 27230, 28397, 38900, 51100, 54460, 56794, 68075, 113588, 136150, 141985, 198779, 272300, 283970, 397558, 567940, 709925, 795116, 993895, 1419850, 1987790, 2839700, 3975580, 4969475, 9938950, 19877900]

約数ペア:

[(1, 19877900), (2, 9938950), (4, 4969475), (5, 3975580), (7, 2839700), (10, 1987790), (14, 1419850), (20, 993895), (25, 795116), (28, 709925), (35, 567940), (50, 397558), (70, 283970), (73, 272300), (100, 198779), (140, 141985), (146, 136150), (175, 113588), (292, 68075), (350, 56794), (365, 54460), (389, 51100), (511, 38900), (700, 28397), (730, 27230), (778, 25550), (1022, 19450), (1460, 13615), (1556, 12775), (1825, 10892), (1945, 10220), (2044, 9725), (2555, 7780), (2723, 7300), (3650, 5446), (3890, 5110)]