21453440

素因数分解:

$2^7\times 5^1\times {\mathrm{33521}}^1$

素因数の和:33540

約数の個数: 32

約数和(自身を含む): 51288660

約数和(自身を除く): 29835220

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 33521, 67042, 134084, 167605, 268168, 335210, 536336, 670420, 1072672, 1340840, 2145344, 2681680, 4290688, 5363360, 10726720, 21453440]

約数ペア:

[(1, 21453440), (2, 10726720), (4, 5363360), (5, 4290688), (8, 2681680), (10, 2145344), (16, 1340840), (20, 1072672), (32, 670420), (40, 536336), (64, 335210), (80, 268168), (128, 167605), (160, 134084), (320, 67042), (640, 33521)]