31720880

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{509}}^1$

素因数の和:582

約数の個数: 80

約数和(自身を含む): 79682400

約数和(自身を除く): 47961520

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 380, 410, 509, 656, 760, 779, 820, 1018, 1520, 1558, 1640, 2036, 2545, 3116, 3280, 3895, 4072, 5090, 6232, 7790, 8144, 9671, 10180, 12464, 15580, 19342, 20360, 20869, 31160, 38684, 40720, 41738, 48355, 62320, 77368, 83476, 96710, 104345, 154736, 166952, 193420, 208690, 333904, 386840, 396511, 417380, 773680, 793022, 834760, 1586044, 1669520, 1982555, 3172088, 3965110, 6344176, 7930220, 15860440, 31720880]

約数ペア:

[(1, 31720880), (2, 15860440), (4, 7930220), (5, 6344176), (8, 3965110), (10, 3172088), (16, 1982555), (19, 1669520), (20, 1586044), (38, 834760), (40, 793022), (41, 773680), (76, 417380), (80, 396511), (82, 386840), (95, 333904), (152, 208690), (164, 193420), (190, 166952), (205, 154736), (304, 104345), (328, 96710), (380, 83476), (410, 77368), (509, 62320), (656, 48355), (760, 41738), (779, 40720), (820, 38684), (1018, 31160), (1520, 20869), (1558, 20360), (1640, 19342), (2036, 15580), (2545, 12464), (3116, 10180), (3280, 9671), (3895, 8144), (4072, 7790), (5090, 6232)]