19977465

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{499}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 34128000

約数和(自身を除く): 14150535

約数列:

[1, 3, 5, 15, 17, 51, 85, 157, 255, 471, 499, 785, 1497, 2355, 2495, 2669, 7485, 8007, 8483, 13345, 25449, 40035, 42415, 78343, 127245, 235029, 391715, 1175145, 1331831, 3995493, 6659155, 19977465]

約数ペア:

[(1, 19977465), (3, 6659155), (5, 3995493), (15, 1331831), (17, 1175145), (51, 391715), (85, 235029), (157, 127245), (255, 78343), (471, 42415), (499, 40035), (785, 25449), (1497, 13345), (2355, 8483), (2495, 8007), (2669, 7485)]