21638120

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{77279}}^1$

素因数の和:77297

約数の個数: 32

約数和(自身を含む): 55641600

約数和(自身を除く): 34003480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 77279, 154558, 309116, 386395, 540953, 618232, 772790, 1081906, 1545580, 2163812, 2704765, 3091160, 4327624, 5409530, 10819060, 21638120]

約数ペア:

[(1, 21638120), (2, 10819060), (4, 5409530), (5, 4327624), (7, 3091160), (8, 2704765), (10, 2163812), (14, 1545580), (20, 1081906), (28, 772790), (35, 618232), (40, 540953), (56, 386395), (70, 309116), (140, 154558), (280, 77279)]