21597200

素因数分解:

$2^4\times 5^2\times {\mathrm{53993}}^1$

素因数の和:54011

約数の個数: 30

約数和(自身を含む): 51888234

約数和(自身を除く): 30291034

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53993, 107986, 215972, 269965, 431944, 539930, 863888, 1079860, 1349825, 2159720, 2699650, 4319440, 5399300, 10798600, 21597200]

約数ペア:

[(1, 21597200), (2, 10798600), (4, 5399300), (5, 4319440), (8, 2699650), (10, 2159720), (16, 1349825), (20, 1079860), (25, 863888), (40, 539930), (50, 431944), (80, 269965), (100, 215972), (200, 107986), (400, 53993)]