18501320

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5197}}^1$

素因数の和:5297

約数の個数: 32

約数和(自身を含む): 42103800

約数和(自身を除く): 23602480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5197, 10394, 20788, 25985, 41576, 51970, 103940, 207880, 462533, 925066, 1850132, 2312665, 3700264, 4625330, 9250660, 18501320]

約数ペア:

[(1, 18501320), (2, 9250660), (4, 4625330), (5, 3700264), (8, 2312665), (10, 1850132), (20, 925066), (40, 462533), (89, 207880), (178, 103940), (356, 51970), (445, 41576), (712, 25985), (890, 20788), (1780, 10394), (3560, 5197)]