21806320

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{139}}^1$

素因数の和:242

約数の個数: 80

約数和(自身を含む): 53434080

約数和(自身を除く): 31627760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 53, 74, 80, 106, 139, 148, 185, 212, 265, 278, 296, 370, 424, 530, 556, 592, 695, 740, 848, 1060, 1112, 1390, 1480, 1961, 2120, 2224, 2780, 2960, 3922, 4240, 5143, 5560, 7367, 7844, 9805, 10286, 11120, 14734, 15688, 19610, 20572, 25715, 29468, 31376, 36835, 39220, 41144, 51430, 58936, 73670, 78440, 82288, 102860, 117872, 147340, 156880, 205720, 272579, 294680, 411440, 545158, 589360, 1090316, 1362895, 2180632, 2725790, 4361264, 5451580, 10903160, 21806320]

約数ペア:

[(1, 21806320), (2, 10903160), (4, 5451580), (5, 4361264), (8, 2725790), (10, 2180632), (16, 1362895), (20, 1090316), (37, 589360), (40, 545158), (53, 411440), (74, 294680), (80, 272579), (106, 205720), (139, 156880), (148, 147340), (185, 117872), (212, 102860), (265, 82288), (278, 78440), (296, 73670), (370, 58936), (424, 51430), (530, 41144), (556, 39220), (592, 36835), (695, 31376), (740, 29468), (848, 25715), (1060, 20572), (1112, 19610), (1390, 15688), (1480, 14734), (1961, 11120), (2120, 10286), (2224, 9805), (2780, 7844), (2960, 7367), (3922, 5560), (4240, 5143)]