20001015

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{157}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 36972000

約数和(自身を除く): 16970985

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 149, 157, 171, 285, 447, 471, 745, 785, 855, 1341, 1413, 2235, 2355, 2831, 2983, 6705, 7065, 8493, 8949, 14155, 14915, 23393, 25479, 26847, 42465, 44745, 70179, 116965, 127395, 134235, 210537, 350895, 444467, 1052685, 1333401, 2222335, 4000203, 6667005, 20001015]

約数ペア:

[(1, 20001015), (3, 6667005), (5, 4000203), (9, 2222335), (15, 1333401), (19, 1052685), (45, 444467), (57, 350895), (95, 210537), (149, 134235), (157, 127395), (171, 116965), (285, 70179), (447, 44745), (471, 42465), (745, 26847), (785, 25479), (855, 23393), (1341, 14915), (1413, 14155), (2235, 8949), (2355, 8493), (2831, 7065), (2983, 6705)]