18738640

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:280

約数の個数: 80

約数和(自身を含む): 46403280

約数和(自身を除く): 27664640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 41, 58, 80, 82, 116, 145, 164, 197, 205, 232, 290, 328, 394, 410, 464, 580, 656, 788, 820, 985, 1160, 1189, 1576, 1640, 1970, 2320, 2378, 3152, 3280, 3940, 4756, 5713, 5945, 7880, 8077, 9512, 11426, 11890, 15760, 16154, 19024, 22852, 23780, 28565, 32308, 40385, 45704, 47560, 57130, 64616, 80770, 91408, 95120, 114260, 129232, 161540, 228520, 234233, 323080, 457040, 468466, 646160, 936932, 1171165, 1873864, 2342330, 3747728, 4684660, 9369320, 18738640]

約数ペア:

[(1, 18738640), (2, 9369320), (4, 4684660), (5, 3747728), (8, 2342330), (10, 1873864), (16, 1171165), (20, 936932), (29, 646160), (40, 468466), (41, 457040), (58, 323080), (80, 234233), (82, 228520), (116, 161540), (145, 129232), (164, 114260), (197, 95120), (205, 91408), (232, 80770), (290, 64616), (328, 57130), (394, 47560), (410, 45704), (464, 40385), (580, 32308), (656, 28565), (788, 23780), (820, 22852), (985, 19024), (1160, 16154), (1189, 15760), (1576, 11890), (1640, 11426), (1970, 9512), (2320, 8077), (2378, 7880), (3152, 5945), (3280, 5713), (3940, 4756)]