20897420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61463}}^1$

素因数の和:61489

約数の個数: 24

約数和(自身を含む): 46466784

約数和(自身を除く): 25569364

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61463, 122926, 245852, 307315, 614630, 1044871, 1229260, 2089742, 4179484, 5224355, 10448710, 20897420]

約数ペア:

[(1, 20897420), (2, 10448710), (4, 5224355), (5, 4179484), (10, 2089742), (17, 1229260), (20, 1044871), (34, 614630), (68, 307315), (85, 245852), (170, 122926), (340, 61463)]