20947720

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 49397040

約数和(自身を除く): 28449320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 53, 82, 106, 164, 205, 212, 241, 265, 328, 410, 424, 482, 530, 820, 964, 1060, 1205, 1640, 1928, 2120, 2173, 2410, 4346, 4820, 8692, 9640, 9881, 10865, 12773, 17384, 19762, 21730, 25546, 39524, 43460, 49405, 51092, 63865, 79048, 86920, 98810, 102184, 127730, 197620, 255460, 395240, 510920, 523693, 1047386, 2094772, 2618465, 4189544, 5236930, 10473860, 20947720]

約数ペア:

[(1, 20947720), (2, 10473860), (4, 5236930), (5, 4189544), (8, 2618465), (10, 2094772), (20, 1047386), (40, 523693), (41, 510920), (53, 395240), (82, 255460), (106, 197620), (164, 127730), (205, 102184), (212, 98810), (241, 86920), (265, 79048), (328, 63865), (410, 51092), (424, 49405), (482, 43460), (530, 39524), (820, 25546), (964, 21730), (1060, 19762), (1205, 17384), (1640, 12773), (1928, 10865), (2120, 9881), (2173, 9640), (2410, 8692), (4346, 4820)]