21508040

素因数分解:

$2^3\times 5^1\times {\mathrm{547}}^1\times {\mathrm{983}}^1$

素因数の和:1541

約数の個数: 32

約数和(自身を含む): 48530880

約数和(自身を除く): 27022840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 547, 983, 1094, 1966, 2188, 2735, 3932, 4376, 4915, 5470, 7864, 9830, 10940, 19660, 21880, 39320, 537701, 1075402, 2150804, 2688505, 4301608, 5377010, 10754020, 21508040]

約数ペア:

[(1, 21508040), (2, 10754020), (4, 5377010), (5, 4301608), (8, 2688505), (10, 2150804), (20, 1075402), (40, 537701), (547, 39320), (983, 21880), (1094, 19660), (1966, 10940), (2188, 9830), (2735, 7864), (3932, 5470), (4376, 4915)]