28219180

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:239

約数の個数: 96

約数和(自身を含む): 70076160

約数和(自身を除く): 41856980

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 43, 44, 55, 76, 86, 95, 110, 157, 172, 190, 209, 215, 220, 314, 380, 418, 430, 473, 628, 785, 817, 836, 860, 946, 1045, 1570, 1634, 1727, 1892, 2090, 2365, 2983, 3140, 3268, 3454, 4085, 4180, 4730, 5966, 6751, 6908, 8170, 8635, 8987, 9460, 11932, 13502, 14915, 16340, 17270, 17974, 27004, 29830, 32813, 33755, 34540, 35948, 44935, 59660, 65626, 67510, 74261, 89870, 128269, 131252, 135020, 148522, 164065, 179740, 256538, 297044, 328130, 371305, 513076, 641345, 656260, 742610, 1282690, 1410959, 1485220, 2565380, 2821918, 5643836, 7054795, 14109590, 28219180]

約数ペア:

[(1, 28219180), (2, 14109590), (4, 7054795), (5, 5643836), (10, 2821918), (11, 2565380), (19, 1485220), (20, 1410959), (22, 1282690), (38, 742610), (43, 656260), (44, 641345), (55, 513076), (76, 371305), (86, 328130), (95, 297044), (110, 256538), (157, 179740), (172, 164065), (190, 148522), (209, 135020), (215, 131252), (220, 128269), (314, 89870), (380, 74261), (418, 67510), (430, 65626), (473, 59660), (628, 44935), (785, 35948), (817, 34540), (836, 33755), (860, 32813), (946, 29830), (1045, 27004), (1570, 17974), (1634, 17270), (1727, 16340), (1892, 14915), (2090, 13502), (2365, 11932), (2983, 9460), (3140, 8987), (3268, 8635), (3454, 8170), (4085, 6908), (4180, 6751), (4730, 5966)]