21421240

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7993}}^1$

素因数の和:8071

約数の個数: 32

約数和(自身を含む): 48923280

約数和(自身を除く): 27502040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7993, 15986, 31972, 39965, 63944, 79930, 159860, 319720, 535531, 1071062, 2142124, 2677655, 4284248, 5355310, 10710620, 21421240]

約数ペア:

[(1, 21421240), (2, 10710620), (4, 5355310), (5, 4284248), (8, 2677655), (10, 2142124), (20, 1071062), (40, 535531), (67, 319720), (134, 159860), (268, 79930), (335, 63944), (536, 39965), (670, 31972), (1340, 15986), (2680, 7993)]