20490645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10271}}^1$

素因数の和:10305

約数の個数: 32

約数和(自身を含む): 39444480

約数和(自身を除く): 18953835

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10271, 30813, 51355, 71897, 154065, 195149, 215691, 359485, 585447, 975745, 1078455, 1366043, 2927235, 4098129, 6830215, 20490645]

約数ペア:

[(1, 20490645), (3, 6830215), (5, 4098129), (7, 2927235), (15, 1366043), (19, 1078455), (21, 975745), (35, 585447), (57, 359485), (95, 215691), (105, 195149), (133, 154065), (285, 71897), (399, 51355), (665, 30813), (1995, 10271)]