18679280

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{12289}}^1$

素因数の和:12321

約数の個数: 40

約数和(自身を含む): 45718800

約数和(自身を除く): 27039520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 12289, 24578, 49156, 61445, 98312, 122890, 196624, 233491, 245780, 466982, 491560, 933964, 983120, 1167455, 1867928, 2334910, 3735856, 4669820, 9339640, 18679280]

約数ペア:

[(1, 18679280), (2, 9339640), (4, 4669820), (5, 3735856), (8, 2334910), (10, 1867928), (16, 1167455), (19, 983120), (20, 933964), (38, 491560), (40, 466982), (76, 245780), (80, 233491), (95, 196624), (152, 122890), (190, 98312), (304, 61445), (380, 49156), (760, 24578), (1520, 12289)]