20521760

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:346

約数の個数: 96

約数和(自身を含む): 56391552

約数和(自身を除く): 35869792

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 73, 80, 112, 140, 146, 160, 224, 251, 280, 292, 365, 502, 511, 560, 584, 730, 1004, 1022, 1120, 1168, 1255, 1460, 1757, 2008, 2044, 2336, 2510, 2555, 2920, 3514, 4016, 4088, 5020, 5110, 5840, 7028, 8032, 8176, 8785, 10040, 10220, 11680, 14056, 16352, 17570, 18323, 20080, 20440, 28112, 35140, 36646, 40160, 40880, 56224, 70280, 73292, 81760, 91615, 128261, 140560, 146584, 183230, 256522, 281120, 293168, 366460, 513044, 586336, 641305, 732920, 1026088, 1282610, 1465840, 2052176, 2565220, 2931680, 4104352, 5130440, 10260880, 20521760]

約数ペア:

[(1, 20521760), (2, 10260880), (4, 5130440), (5, 4104352), (7, 2931680), (8, 2565220), (10, 2052176), (14, 1465840), (16, 1282610), (20, 1026088), (28, 732920), (32, 641305), (35, 586336), (40, 513044), (56, 366460), (70, 293168), (73, 281120), (80, 256522), (112, 183230), (140, 146584), (146, 140560), (160, 128261), (224, 91615), (251, 81760), (280, 73292), (292, 70280), (365, 56224), (502, 40880), (511, 40160), (560, 36646), (584, 35140), (730, 28112), (1004, 20440), (1022, 20080), (1120, 18323), (1168, 17570), (1255, 16352), (1460, 14056), (1757, 11680), (2008, 10220), (2044, 10040), (2336, 8785), (2510, 8176), (2555, 8032), (2920, 7028), (3514, 5840), (4016, 5110), (4088, 5020)]