18969520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{7649}}^1$

素因数の和:7693

約数の個数: 40

約数和(自身を含む): 45532800

約数和(自身を除く): 26563280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 7649, 15298, 30596, 38245, 61192, 76490, 122384, 152980, 237119, 305960, 474238, 611920, 948476, 1185595, 1896952, 2371190, 3793904, 4742380, 9484760, 18969520]

約数ペア:

[(1, 18969520), (2, 9484760), (4, 4742380), (5, 3793904), (8, 2371190), (10, 1896952), (16, 1185595), (20, 948476), (31, 611920), (40, 474238), (62, 305960), (80, 237119), (124, 152980), (155, 122384), (248, 76490), (310, 61192), (496, 38245), (620, 30596), (1240, 15298), (2480, 7649)]