20091280

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{79}}^1$

素因数の和:137

約数の個数: 120

約数和(自身を含む): 54817920

約数和(自身を除く): 34726640

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 34, 40, 44, 55, 68, 79, 80, 85, 88, 110, 136, 158, 170, 176, 187, 220, 272, 289, 316, 340, 374, 395, 440, 578, 632, 680, 748, 790, 869, 880, 935, 1156, 1264, 1343, 1360, 1445, 1496, 1580, 1738, 1870, 2312, 2686, 2890, 2992, 3160, 3179, 3476, 3740, 4345, 4624, 5372, 5780, 6320, 6358, 6715, 6952, 7480, 8690, 10744, 11560, 12716, 13430, 13904, 14773, 14960, 15895, 17380, 21488, 22831, 23120, 25432, 26860, 29546, 31790, 34760, 45662, 50864, 53720, 59092, 63580, 69520, 73865, 91324, 107440, 114155, 118184, 127160, 147730, 182648, 228310, 236368, 251141, 254320, 295460, 365296, 456620, 502282, 590920, 913240, 1004564, 1181840, 1255705, 1826480, 2009128, 2511410, 4018256, 5022820, 10045640, 20091280]

約数ペア:

[(1, 20091280), (2, 10045640), (4, 5022820), (5, 4018256), (8, 2511410), (10, 2009128), (11, 1826480), (16, 1255705), (17, 1181840), (20, 1004564), (22, 913240), (34, 590920), (40, 502282), (44, 456620), (55, 365296), (68, 295460), (79, 254320), (80, 251141), (85, 236368), (88, 228310), (110, 182648), (136, 147730), (158, 127160), (170, 118184), (176, 114155), (187, 107440), (220, 91324), (272, 73865), (289, 69520), (316, 63580), (340, 59092), (374, 53720), (395, 50864), (440, 45662), (578, 34760), (632, 31790), (680, 29546), (748, 26860), (790, 25432), (869, 23120), (880, 22831), (935, 21488), (1156, 17380), (1264, 15895), (1343, 14960), (1360, 14773), (1445, 13904), (1496, 13430), (1580, 12716), (1738, 11560), (1870, 10744), (2312, 8690), (2686, 7480), (2890, 6952), (2992, 6715), (3160, 6358), (3179, 6320), (3476, 5780), (3740, 5372), (4345, 4624)]