21393880

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{18443}}^1$

素因数の和:18483

約数の個数: 32

約数和(自身を含む): 49798800

約数和(自身を除く): 28404920

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 1160, 18443, 36886, 73772, 92215, 147544, 184430, 368860, 534847, 737720, 1069694, 2139388, 2674235, 4278776, 5348470, 10696940, 21393880]

約数ペア:

[(1, 21393880), (2, 10696940), (4, 5348470), (5, 4278776), (8, 2674235), (10, 2139388), (20, 1069694), (29, 737720), (40, 534847), (58, 368860), (116, 184430), (145, 147544), (232, 92215), (290, 73772), (580, 36886), (1160, 18443)]