20891863520

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{320821}}^1$

素因数の和:320884

約数の個数: 96

約数和(自身を含む): 55299446496

約数和(自身を除く): 34407582976

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 37, 40, 44, 55, 74, 80, 88, 110, 148, 160, 176, 185, 220, 296, 352, 370, 407, 440, 592, 740, 814, 880, 1184, 1480, 1628, 1760, 2035, 2960, 3256, 4070, 5920, 6512, 8140, 13024, 16280, 32560, 65120, 320821, 641642, 1283284, 1604105, 2566568, 3208210, 3529031, 5133136, 6416420, 7058062, 10266272, 11870377, 12832840, 14116124, 17645155, 23740754, 25665680, 28232248, 35290310, 47481508, 51331360, 56464496, 59351885, 70580620, 94963016, 112928992, 118703770, 130574147, 141161240, 189926032, 237407540, 261148294, 282322480, 379852064, 474815080, 522296588, 564644960, 652870735, 949630160, 1044593176, 1305741470, 1899260320, 2089186352, 2611482940, 4178372704, 5222965880, 10445931760, 20891863520]

約数ペア:

[(1, 20891863520), (2, 10445931760), (4, 5222965880), (5, 4178372704), (8, 2611482940), (10, 2089186352), (11, 1899260320), (16, 1305741470), (20, 1044593176), (22, 949630160), (32, 652870735), (37, 564644960), (40, 522296588), (44, 474815080), (55, 379852064), (74, 282322480), (80, 261148294), (88, 237407540), (110, 189926032), (148, 141161240), (160, 130574147), (176, 118703770), (185, 112928992), (220, 94963016), (296, 70580620), (352, 59351885), (370, 56464496), (407, 51331360), (440, 47481508), (592, 35290310), (740, 28232248), (814, 25665680), (880, 23740754), (1184, 17645155), (1480, 14116124), (1628, 12832840), (1760, 11870377), (2035, 10266272), (2960, 7058062), (3256, 6416420), (4070, 5133136), (5920, 3529031), (6512, 3208210), (8140, 2566568), (13024, 1604105), (16280, 1283284), (32560, 641642), (65120, 320821)]