820420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{127}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 1935360

約数和(自身を除く): 1114940

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 34, 38, 68, 76, 85, 95, 127, 170, 190, 254, 323, 340, 380, 508, 635, 646, 1270, 1292, 1615, 2159, 2413, 2540, 3230, 4318, 4826, 6460, 8636, 9652, 10795, 12065, 21590, 24130, 41021, 43180, 48260, 82042, 164084, 205105, 410210, 820420]

約数ペア:

[(1, 820420), (2, 410210), (4, 205105), (5, 164084), (10, 82042), (17, 48260), (19, 43180), (20, 41021), (34, 24130), (38, 21590), (68, 12065), (76, 10795), (85, 9652), (95, 8636), (127, 6460), (170, 4826), (190, 4318), (254, 3230), (323, 2540), (340, 2413), (380, 2159), (508, 1615), (635, 1292), (646, 1270)]