17981420

素因数分解:

$2^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{4261}}^1$

素因数の和:4481

約数の個数: 24

約数和(自身を含む): 37948848

約数和(自身を除く): 19967428

約数列:

[1, 2, 4, 5, 10, 20, 211, 422, 844, 1055, 2110, 4220, 4261, 8522, 17044, 21305, 42610, 85220, 899071, 1798142, 3596284, 4495355, 8990710, 17981420]

約数ペア:

[(1, 17981420), (2, 8990710), (4, 4495355), (5, 3596284), (10, 1798142), (20, 899071), (211, 85220), (422, 42610), (844, 21305), (1055, 17044), (2110, 8522), (4220, 4261)]