20986504

素因数分解:

$2^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:219

約数の個数: 96

約数和(自身を含む): 51874560

約数和(自身を除く): 30888056

約数列:

[1, 2, 4, 7, 8, 11, 14, 22, 28, 31, 44, 49, 56, 62, 77, 88, 98, 124, 154, 157, 196, 217, 248, 308, 314, 341, 392, 434, 539, 616, 628, 682, 868, 1078, 1099, 1256, 1364, 1519, 1727, 1736, 2156, 2198, 2387, 2728, 3038, 3454, 4312, 4396, 4774, 4867, 6076, 6908, 7693, 8792, 9548, 9734, 12089, 12152, 13816, 15386, 16709, 19096, 19468, 24178, 30772, 33418, 34069, 38936, 48356, 53537, 61544, 66836, 68138, 84623, 96712, 107074, 133672, 136276, 169246, 214148, 238483, 272552, 338492, 374759, 428296, 476966, 676984, 749518, 953932, 1499036, 1907864, 2623313, 2998072, 5246626, 10493252, 20986504]

約数ペア:

[(1, 20986504), (2, 10493252), (4, 5246626), (7, 2998072), (8, 2623313), (11, 1907864), (14, 1499036), (22, 953932), (28, 749518), (31, 676984), (44, 476966), (49, 428296), (56, 374759), (62, 338492), (77, 272552), (88, 238483), (98, 214148), (124, 169246), (154, 136276), (157, 133672), (196, 107074), (217, 96712), (248, 84623), (308, 68138), (314, 66836), (341, 61544), (392, 53537), (434, 48356), (539, 38936), (616, 34069), (628, 33418), (682, 30772), (868, 24178), (1078, 19468), (1099, 19096), (1256, 16709), (1364, 15386), (1519, 13816), (1727, 12152), (1736, 12089), (2156, 9734), (2198, 9548), (2387, 8792), (2728, 7693), (3038, 6908), (3454, 6076), (4312, 4867), (4396, 4774)]