20142560

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^2\times {\mathrm{131}}^1$

素因数の和:208

約数の個数: 72

約数和(自身を含む): 49546728

約数和(自身を除く): 29404168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 131, 155, 160, 248, 262, 310, 496, 524, 620, 655, 961, 992, 1048, 1240, 1310, 1922, 2096, 2480, 2620, 3844, 4061, 4192, 4805, 4960, 5240, 7688, 8122, 9610, 10480, 15376, 16244, 19220, 20305, 20960, 30752, 32488, 38440, 40610, 64976, 76880, 81220, 125891, 129952, 153760, 162440, 251782, 324880, 503564, 629455, 649760, 1007128, 1258910, 2014256, 2517820, 4028512, 5035640, 10071280, 20142560]

約数ペア:

[(1, 20142560), (2, 10071280), (4, 5035640), (5, 4028512), (8, 2517820), (10, 2014256), (16, 1258910), (20, 1007128), (31, 649760), (32, 629455), (40, 503564), (62, 324880), (80, 251782), (124, 162440), (131, 153760), (155, 129952), (160, 125891), (248, 81220), (262, 76880), (310, 64976), (496, 40610), (524, 38440), (620, 32488), (655, 30752), (961, 20960), (992, 20305), (1048, 19220), (1240, 16244), (1310, 15376), (1922, 10480), (2096, 9610), (2480, 8122), (2620, 7688), (3844, 5240), (4061, 4960), (4192, 4805)]