21534820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{347}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 47355840

約数和(自身を除く): 25821020

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 107, 116, 145, 214, 290, 347, 428, 535, 580, 694, 1070, 1388, 1735, 2140, 3103, 3470, 6206, 6940, 10063, 12412, 15515, 20126, 31030, 37129, 40252, 50315, 62060, 74258, 100630, 148516, 185645, 201260, 371290, 742580, 1076741, 2153482, 4306964, 5383705, 10767410, 21534820]

約数ペア:

[(1, 21534820), (2, 10767410), (4, 5383705), (5, 4306964), (10, 2153482), (20, 1076741), (29, 742580), (58, 371290), (107, 201260), (116, 185645), (145, 148516), (214, 100630), (290, 74258), (347, 62060), (428, 50315), (535, 40252), (580, 37129), (694, 31030), (1070, 20126), (1388, 15515), (1735, 12412), (2140, 10063), (3103, 6940), (3470, 6206)]