18840320

素因数分解:

$2^8\times 5^1\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:421

約数の個数: 72

約数和(自身を含む): 46357920

約数和(自身を除く): 27517600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 359, 410, 640, 656, 718, 820, 1280, 1312, 1436, 1640, 1795, 2624, 2872, 3280, 3590, 5248, 5744, 6560, 7180, 10496, 11488, 13120, 14360, 14719, 22976, 26240, 28720, 29438, 45952, 52480, 57440, 58876, 73595, 91904, 114880, 117752, 147190, 229760, 235504, 294380, 459520, 471008, 588760, 942016, 1177520, 1884032, 2355040, 3768064, 4710080, 9420160, 18840320]

約数ペア:

[(1, 18840320), (2, 9420160), (4, 4710080), (5, 3768064), (8, 2355040), (10, 1884032), (16, 1177520), (20, 942016), (32, 588760), (40, 471008), (41, 459520), (64, 294380), (80, 235504), (82, 229760), (128, 147190), (160, 117752), (164, 114880), (205, 91904), (256, 73595), (320, 58876), (328, 57440), (359, 52480), (410, 45952), (640, 29438), (656, 28720), (718, 26240), (820, 22976), (1280, 14719), (1312, 14360), (1436, 13120), (1640, 11488), (1795, 10496), (2624, 7180), (2872, 6560), (3280, 5744), (3590, 5248)]