21840540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{2657}}^1$

素因数の和:2806

約数の個数: 48

約数和(自身を含む): 61623072

約数和(自身を除く): 39782532

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 137, 274, 411, 548, 685, 822, 1370, 1644, 2055, 2657, 2740, 4110, 5314, 7971, 8220, 10628, 13285, 15942, 26570, 31884, 39855, 53140, 79710, 159420, 364009, 728018, 1092027, 1456036, 1820045, 2184054, 3640090, 4368108, 5460135, 7280180, 10920270, 21840540]

約数ペア:

[(1, 21840540), (2, 10920270), (3, 7280180), (4, 5460135), (5, 4368108), (6, 3640090), (10, 2184054), (12, 1820045), (15, 1456036), (20, 1092027), (30, 728018), (60, 364009), (137, 159420), (274, 79710), (411, 53140), (548, 39855), (685, 31884), (822, 26570), (1370, 15942), (1644, 13285), (2055, 10628), (2657, 8220), (2740, 7971), (4110, 5314)]