20798960

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2857}}^1$

素因数の和:2890

約数の個数: 80

約数和(自身を含む): 59537856

約数和(自身を除く): 38738896

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2857, 3640, 5714, 7280, 11428, 14285, 19999, 22856, 28570, 37141, 39998, 45712, 57140, 74282, 79996, 99995, 114280, 148564, 159992, 185705, 199990, 228560, 259987, 297128, 319984, 371410, 399980, 519974, 594256, 742820, 799960, 1039948, 1299935, 1485640, 1599920, 2079896, 2599870, 2971280, 4159792, 5199740, 10399480, 20798960]

約数ペア:

[(1, 20798960), (2, 10399480), (4, 5199740), (5, 4159792), (7, 2971280), (8, 2599870), (10, 2079896), (13, 1599920), (14, 1485640), (16, 1299935), (20, 1039948), (26, 799960), (28, 742820), (35, 594256), (40, 519974), (52, 399980), (56, 371410), (65, 319984), (70, 297128), (80, 259987), (91, 228560), (104, 199990), (112, 185705), (130, 159992), (140, 148564), (182, 114280), (208, 99995), (260, 79996), (280, 74282), (364, 57140), (455, 45712), (520, 39998), (560, 37141), (728, 28570), (910, 22856), (1040, 19999), (1456, 14285), (1820, 11428), (2857, 7280), (3640, 5714)]