21717240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1321}}^1$

素因数の和:1472

約数の個数: 64

約数和(自身を含む): 65676960

約数和(自身を除く): 43959720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 137, 274, 411, 548, 685, 822, 1096, 1321, 1370, 1644, 2055, 2642, 2740, 3288, 3963, 4110, 5284, 5480, 6605, 7926, 8220, 10568, 13210, 15852, 16440, 19815, 26420, 31704, 39630, 52840, 79260, 158520, 180977, 361954, 542931, 723908, 904885, 1085862, 1447816, 1809770, 2171724, 2714655, 3619540, 4343448, 5429310, 7239080, 10858620, 21717240]

約数ペア:

[(1, 21717240), (2, 10858620), (3, 7239080), (4, 5429310), (5, 4343448), (6, 3619540), (8, 2714655), (10, 2171724), (12, 1809770), (15, 1447816), (20, 1085862), (24, 904885), (30, 723908), (40, 542931), (60, 361954), (120, 180977), (137, 158520), (274, 79260), (411, 52840), (548, 39630), (685, 31704), (822, 26420), (1096, 19815), (1321, 16440), (1370, 15852), (1644, 13210), (2055, 10568), (2642, 8220), (2740, 7926), (3288, 6605), (3963, 5480), (4110, 5284)]