21372680

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2063}}^1$

素因数の和:2118

約数の個数: 64

約数和(自身を含む): 56471040

約数和(自身を除く): 35098360

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 140, 148, 185, 259, 280, 296, 370, 518, 740, 1036, 1295, 1480, 2063, 2072, 2590, 4126, 5180, 8252, 10315, 10360, 14441, 16504, 20630, 28882, 41260, 57764, 72205, 76331, 82520, 115528, 144410, 152662, 288820, 305324, 381655, 534317, 577640, 610648, 763310, 1068634, 1526620, 2137268, 2671585, 3053240, 4274536, 5343170, 10686340, 21372680]

約数ペア:

[(1, 21372680), (2, 10686340), (4, 5343170), (5, 4274536), (7, 3053240), (8, 2671585), (10, 2137268), (14, 1526620), (20, 1068634), (28, 763310), (35, 610648), (37, 577640), (40, 534317), (56, 381655), (70, 305324), (74, 288820), (140, 152662), (148, 144410), (185, 115528), (259, 82520), (280, 76331), (296, 72205), (370, 57764), (518, 41260), (740, 28882), (1036, 20630), (1295, 16504), (1480, 14441), (2063, 10360), (2072, 10315), (2590, 8252), (4126, 5180)]