81058940

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{103}}^1\times {\mathrm{109}}^1$

素因数の和:259

約数の個数: 72

約数和(自身を含む): 183062880

約数和(自身を除く): 102003940

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 103, 109, 190, 206, 218, 361, 380, 412, 436, 515, 545, 722, 1030, 1090, 1444, 1805, 1957, 2060, 2071, 2180, 3610, 3914, 4142, 7220, 7828, 8284, 9785, 10355, 11227, 19570, 20710, 22454, 37183, 39140, 39349, 41420, 44908, 56135, 74366, 78698, 112270, 148732, 157396, 185915, 196745, 213313, 224540, 371830, 393490, 426626, 743660, 786980, 853252, 1066565, 2133130, 4052947, 4266260, 8105894, 16211788, 20264735, 40529470, 81058940]

約数ペア:

[(1, 81058940), (2, 40529470), (4, 20264735), (5, 16211788), (10, 8105894), (19, 4266260), (20, 4052947), (38, 2133130), (76, 1066565), (95, 853252), (103, 786980), (109, 743660), (190, 426626), (206, 393490), (218, 371830), (361, 224540), (380, 213313), (412, 196745), (436, 185915), (515, 157396), (545, 148732), (722, 112270), (1030, 78698), (1090, 74366), (1444, 56135), (1805, 44908), (1957, 41420), (2060, 39349), (2071, 39140), (2180, 37183), (3610, 22454), (3914, 20710), (4142, 19570), (7220, 11227), (7828, 10355), (8284, 9785)]