21380260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{619}}^1$

素因数の和:796

約数の個数: 48

約数和(自身を含む): 49371840

約数和(自身を除く): 27991580

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 157, 220, 314, 619, 628, 785, 1238, 1570, 1727, 2476, 3095, 3140, 3454, 6190, 6809, 6908, 8635, 12380, 13618, 17270, 27236, 34045, 34540, 68090, 97183, 136180, 194366, 388732, 485915, 971830, 1069013, 1943660, 2138026, 4276052, 5345065, 10690130, 21380260]

約数ペア:

[(1, 21380260), (2, 10690130), (4, 5345065), (5, 4276052), (10, 2138026), (11, 1943660), (20, 1069013), (22, 971830), (44, 485915), (55, 388732), (110, 194366), (157, 136180), (220, 97183), (314, 68090), (619, 34540), (628, 34045), (785, 27236), (1238, 17270), (1570, 13618), (1727, 12380), (2476, 8635), (3095, 6908), (3140, 6809), (3454, 6190)]