400407520

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131713}}^1$

素因数の和:131747

約数の個数: 48

約数和(自身を含む): 995757840

約数和(自身を除く): 595350320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 131713, 263426, 526852, 658565, 1053704, 1317130, 2107408, 2502547, 2634260, 4214816, 5005094, 5268520, 10010188, 10537040, 12512735, 20020376, 21074080, 25025470, 40040752, 50050940, 80081504, 100101880, 200203760, 400407520]

約数ペア:

[(1, 400407520), (2, 200203760), (4, 100101880), (5, 80081504), (8, 50050940), (10, 40040752), (16, 25025470), (19, 21074080), (20, 20020376), (32, 12512735), (38, 10537040), (40, 10010188), (76, 5268520), (80, 5005094), (95, 4214816), (152, 2634260), (160, 2502547), (190, 2107408), (304, 1317130), (380, 1053704), (608, 658565), (760, 526852), (1520, 263426), (3040, 131713)]