420080975

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:360

約数の個数: 48

約数和(自身を含む): 568951680

約数和(自身を除く): 148870705

約数列:

[1, 5, 19, 25, 43, 95, 131, 157, 215, 475, 655, 785, 817, 1075, 2489, 2983, 3275, 3925, 4085, 5633, 6751, 12445, 14915, 20425, 20567, 28165, 33755, 62225, 74575, 102835, 107027, 128269, 140825, 168775, 390773, 514175, 535135, 641345, 884381, 1953865, 2675675, 3206725, 4421905, 9769325, 16803239, 22109525, 84016195, 420080975]

約数ペア:

[(1, 420080975), (5, 84016195), (19, 22109525), (25, 16803239), (43, 9769325), (95, 4421905), (131, 3206725), (157, 2675675), (215, 1953865), (475, 884381), (655, 641345), (785, 535135), (817, 514175), (1075, 390773), (2489, 168775), (2983, 140825), (3275, 128269), (3925, 107027), (4085, 102835), (5633, 74575), (6751, 62225), (12445, 33755), (14915, 28165), (20425, 20567)]