81781388

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1\times {\mathrm{431}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 160030080

約数和(自身を除く): 78248692

約数列:

[1, 2, 4, 13, 26, 41, 52, 82, 89, 164, 178, 356, 431, 533, 862, 1066, 1157, 1724, 2132, 2314, 3649, 4628, 5603, 7298, 11206, 14596, 17671, 22412, 35342, 38359, 47437, 70684, 76718, 94874, 153436, 189748, 229723, 459446, 498667, 918892, 997334, 1572719, 1994668, 3145438, 6290876, 20445347, 40890694, 81781388]

約数ペア:

[(1, 81781388), (2, 40890694), (4, 20445347), (13, 6290876), (26, 3145438), (41, 1994668), (52, 1572719), (82, 997334), (89, 918892), (164, 498667), (178, 459446), (356, 229723), (431, 189748), (533, 153436), (862, 94874), (1066, 76718), (1157, 70684), (1724, 47437), (2132, 38359), (2314, 35342), (3649, 22412), (4628, 17671), (5603, 14596), (7298, 11206)]