17991005

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{149}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 24192000

約数和(自身を除く): 6200995

約数列:

[1, 5, 19, 31, 41, 95, 149, 155, 205, 589, 745, 779, 1271, 2831, 2945, 3895, 4619, 6109, 6355, 14155, 23095, 24149, 30545, 87761, 116071, 120745, 189379, 438805, 580355, 946895, 3598201, 17991005]

約数ペア:

[(1, 17991005), (5, 3598201), (19, 946895), (31, 580355), (41, 438805), (95, 189379), (149, 120745), (155, 116071), (205, 87761), (589, 30545), (745, 24149), (779, 23095), (1271, 14155), (2831, 6355), (2945, 6109), (3895, 4619)]