20995280

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1$

素因数の和:264

約数の個数: 80

約数和(自身を含む): 51652944

約数和(自身を除く): 30657664

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 41, 74, 80, 82, 148, 164, 173, 185, 205, 296, 328, 346, 370, 410, 592, 656, 692, 740, 820, 865, 1384, 1480, 1517, 1640, 1730, 2768, 2960, 3034, 3280, 3460, 6068, 6401, 6920, 7093, 7585, 12136, 12802, 13840, 14186, 15170, 24272, 25604, 28372, 30340, 32005, 35465, 51208, 56744, 60680, 64010, 70930, 102416, 113488, 121360, 128020, 141860, 256040, 262441, 283720, 512080, 524882, 567440, 1049764, 1312205, 2099528, 2624410, 4199056, 5248820, 10497640, 20995280]

約数ペア:

[(1, 20995280), (2, 10497640), (4, 5248820), (5, 4199056), (8, 2624410), (10, 2099528), (16, 1312205), (20, 1049764), (37, 567440), (40, 524882), (41, 512080), (74, 283720), (80, 262441), (82, 256040), (148, 141860), (164, 128020), (173, 121360), (185, 113488), (205, 102416), (296, 70930), (328, 64010), (346, 60680), (370, 56744), (410, 51208), (592, 35465), (656, 32005), (692, 30340), (740, 28372), (820, 25604), (865, 24272), (1384, 15170), (1480, 14186), (1517, 13840), (1640, 12802), (1730, 12136), (2768, 7585), (2960, 7093), (3034, 6920), (3280, 6401), (3460, 6068)]