21989100

素因数分解:

$2^2\times 3^1\times 5^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{283}}^1$

素因数の和:344

約数の個数: 144

約数和(自身を含む): 74939648

約数和(自身を除く): 52950548

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 25, 28, 30, 35, 37, 42, 50, 60, 70, 74, 75, 84, 100, 105, 111, 140, 148, 150, 175, 185, 210, 222, 259, 283, 300, 350, 370, 420, 444, 518, 525, 555, 566, 700, 740, 777, 849, 925, 1036, 1050, 1110, 1132, 1295, 1415, 1554, 1698, 1850, 1981, 2100, 2220, 2590, 2775, 2830, 3108, 3396, 3700, 3885, 3962, 4245, 5180, 5550, 5660, 5943, 6475, 7075, 7770, 7924, 8490, 9905, 10471, 11100, 11886, 12950, 14150, 15540, 16980, 19425, 19810, 20942, 21225, 23772, 25900, 28300, 29715, 31413, 38850, 39620, 41884, 42450, 49525, 52355, 59430, 62826, 73297, 77700, 84900, 99050, 104710, 118860, 125652, 146594, 148575, 157065, 198100, 209420, 219891, 261775, 293188, 297150, 314130, 366485, 439782, 523550, 594300, 628260, 732970, 785325, 879564, 1047100, 1099455, 1465940, 1570650, 1832425, 2198910, 3141300, 3664850, 4397820, 5497275, 7329700, 10994550, 21989100]

約数ペア:

[(1, 21989100), (2, 10994550), (3, 7329700), (4, 5497275), (5, 4397820), (6, 3664850), (7, 3141300), (10, 2198910), (12, 1832425), (14, 1570650), (15, 1465940), (20, 1099455), (21, 1047100), (25, 879564), (28, 785325), (30, 732970), (35, 628260), (37, 594300), (42, 523550), (50, 439782), (60, 366485), (70, 314130), (74, 297150), (75, 293188), (84, 261775), (100, 219891), (105, 209420), (111, 198100), (140, 157065), (148, 148575), (150, 146594), (175, 125652), (185, 118860), (210, 104710), (222, 99050), (259, 84900), (283, 77700), (300, 73297), (350, 62826), (370, 59430), (420, 52355), (444, 49525), (518, 42450), (525, 41884), (555, 39620), (566, 38850), (700, 31413), (740, 29715), (777, 28300), (849, 25900), (925, 23772), (1036, 21225), (1050, 20942), (1110, 19810), (1132, 19425), (1295, 16980), (1415, 15540), (1554, 14150), (1698, 12950), (1850, 11886), (1981, 11100), (2100, 10471), (2220, 9905), (2590, 8490), (2775, 7924), (2830, 7770), (3108, 7075), (3396, 6475), (3700, 5943), (3885, 5660), (3962, 5550), (4245, 5180)]