19947320

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{12163}}^1$

素因数の和:12215

約数の個数: 32

約数和(自身を含む): 45979920

約数和(自身を除く): 26032600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 12163, 24326, 48652, 60815, 97304, 121630, 243260, 486520, 498683, 997366, 1994732, 2493415, 3989464, 4986830, 9973660, 19947320]

約数ペア:

[(1, 19947320), (2, 9973660), (4, 4986830), (5, 3989464), (8, 2493415), (10, 1994732), (20, 997366), (40, 498683), (41, 486520), (82, 243260), (164, 121630), (205, 97304), (328, 60815), (410, 48652), (820, 24326), (1640, 12163)]