20852720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1619}}^1$

素因数の和:1662

約数の個数: 80

約数和(自身を含む): 57853440

約数和(自身を除く): 37000720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1619, 1840, 2576, 3220, 3238, 6440, 6476, 8095, 11333, 12880, 12952, 16190, 22666, 25904, 32380, 37237, 45332, 56665, 64760, 74474, 90664, 113330, 129520, 148948, 181328, 186185, 226660, 260659, 297896, 372370, 453320, 521318, 595792, 744740, 906640, 1042636, 1303295, 1489480, 2085272, 2606590, 2978960, 4170544, 5213180, 10426360, 20852720]

約数ペア:

[(1, 20852720), (2, 10426360), (4, 5213180), (5, 4170544), (7, 2978960), (8, 2606590), (10, 2085272), (14, 1489480), (16, 1303295), (20, 1042636), (23, 906640), (28, 744740), (35, 595792), (40, 521318), (46, 453320), (56, 372370), (70, 297896), (80, 260659), (92, 226660), (112, 186185), (115, 181328), (140, 148948), (161, 129520), (184, 113330), (230, 90664), (280, 74474), (322, 64760), (368, 56665), (460, 45332), (560, 37237), (644, 32380), (805, 25904), (920, 22666), (1288, 16190), (1610, 12952), (1619, 12880), (1840, 11333), (2576, 8095), (3220, 6476), (3238, 6440)]