17987180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{223}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 39325440

約数和(自身を除く): 21338260

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 109, 148, 185, 218, 223, 370, 436, 446, 545, 740, 892, 1090, 1115, 2180, 2230, 4033, 4460, 8066, 8251, 16132, 16502, 20165, 24307, 33004, 40330, 41255, 48614, 80660, 82510, 97228, 121535, 165020, 243070, 486140, 899359, 1798718, 3597436, 4496795, 8993590, 17987180]

約数ペア:

[(1, 17987180), (2, 8993590), (4, 4496795), (5, 3597436), (10, 1798718), (20, 899359), (37, 486140), (74, 243070), (109, 165020), (148, 121535), (185, 97228), (218, 82510), (223, 80660), (370, 48614), (436, 41255), (446, 40330), (545, 33004), (740, 24307), (892, 20165), (1090, 16502), (1115, 16132), (2180, 8251), (2230, 8066), (4033, 4460)]