21720064520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{157}}^1\times {\mathrm{44917}}^1$

素因数の和:45103

約数の個数: 128

約数和(自身を含む): 61318460160

約数和(自身を除く): 39598395640

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 157, 220, 280, 308, 314, 385, 440, 616, 628, 770, 785, 1099, 1256, 1540, 1570, 1727, 2198, 3080, 3140, 3454, 4396, 5495, 6280, 6908, 8635, 8792, 10990, 12089, 13816, 17270, 21980, 24178, 34540, 43960, 44917, 48356, 60445, 69080, 89834, 96712, 120890, 179668, 224585, 241780, 314419, 359336, 449170, 483560, 494087, 628838, 898340, 988174, 1257676, 1572095, 1796680, 1976348, 2470435, 2515352, 3144190, 3458609, 3952696, 4940870, 6288380, 6917218, 7051969, 9881740, 12576760, 13834436, 14103938, 17293045, 19763480, 27668872, 28207876, 34586090, 35259845, 49363783, 56415752, 69172180, 70519690, 77571659, 98727566, 138344360, 141039380, 155143318, 197455132, 246818915, 282078760, 310286636, 387858295, 394910264, 493637830, 543001613, 620573272, 775716590, 987275660, 1086003226, 1551433180, 1974551320, 2172006452, 2715008065, 3102866360, 4344012904, 5430016130, 10860032260, 21720064520]

約数ペア:

[(1, 21720064520), (2, 10860032260), (4, 5430016130), (5, 4344012904), (7, 3102866360), (8, 2715008065), (10, 2172006452), (11, 1974551320), (14, 1551433180), (20, 1086003226), (22, 987275660), (28, 775716590), (35, 620573272), (40, 543001613), (44, 493637830), (55, 394910264), (56, 387858295), (70, 310286636), (77, 282078760), (88, 246818915), (110, 197455132), (140, 155143318), (154, 141039380), (157, 138344360), (220, 98727566), (280, 77571659), (308, 70519690), (314, 69172180), (385, 56415752), (440, 49363783), (616, 35259845), (628, 34586090), (770, 28207876), (785, 27668872), (1099, 19763480), (1256, 17293045), (1540, 14103938), (1570, 13834436), (1727, 12576760), (2198, 9881740), (3080, 7051969), (3140, 6917218), (3454, 6288380), (4396, 4940870), (5495, 3952696), (6280, 3458609), (6908, 3144190), (8635, 2515352), (8792, 2470435), (10990, 1976348), (12089, 1796680), (13816, 1572095), (17270, 1257676), (21980, 988174), (24178, 898340), (34540, 628838), (43960, 494087), (44917, 483560), (48356, 449170), (60445, 359336), (69080, 314419), (89834, 241780), (96712, 224585), (120890, 179668)]