20080720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{1201}}^1$

素因数の和:1244

約数の個数: 80

約数和(自身を含む): 53657280

約数和(自身を除く): 33576560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 38, 40, 44, 55, 76, 80, 88, 95, 110, 152, 176, 190, 209, 220, 304, 380, 418, 440, 760, 836, 880, 1045, 1201, 1520, 1672, 2090, 2402, 3344, 4180, 4804, 6005, 8360, 9608, 12010, 13211, 16720, 19216, 22819, 24020, 26422, 45638, 48040, 52844, 66055, 91276, 96080, 105688, 114095, 132110, 182552, 211376, 228190, 251009, 264220, 365104, 456380, 502018, 528440, 912760, 1004036, 1056880, 1255045, 1825520, 2008072, 2510090, 4016144, 5020180, 10040360, 20080720]

約数ペア:

[(1, 20080720), (2, 10040360), (4, 5020180), (5, 4016144), (8, 2510090), (10, 2008072), (11, 1825520), (16, 1255045), (19, 1056880), (20, 1004036), (22, 912760), (38, 528440), (40, 502018), (44, 456380), (55, 365104), (76, 264220), (80, 251009), (88, 228190), (95, 211376), (110, 182552), (152, 132110), (176, 114095), (190, 105688), (209, 96080), (220, 91276), (304, 66055), (380, 52844), (418, 48040), (440, 45638), (760, 26422), (836, 24020), (880, 22819), (1045, 19216), (1201, 16720), (1520, 13211), (1672, 12010), (2090, 9608), (2402, 8360), (3344, 6005), (4180, 4804)]