21979960

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28921}}^1$

素因数の和:28951

約数の個数: 32

約数和(自身を含む): 52059600

約数和(自身を除く): 30079640

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28921, 57842, 115684, 144605, 231368, 289210, 549499, 578420, 1098998, 1156840, 2197996, 2747495, 4395992, 5494990, 10989980, 21979960]

約数ペア:

[(1, 21979960), (2, 10989980), (4, 5494990), (5, 4395992), (8, 2747495), (10, 2197996), (19, 1156840), (20, 1098998), (38, 578420), (40, 549499), (76, 289210), (95, 231368), (152, 144605), (190, 115684), (380, 57842), (760, 28921)]