20816439

素因数分解:

$3^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{59}}^1\times {\mathrm{317}}^1$

素因数の和:439

約数の個数: 32

約数和(自身を含む): 32970240

約数和(自身を除く): 12153801

約数列:

[1, 3, 7, 21, 53, 59, 159, 177, 317, 371, 413, 951, 1113, 1239, 2219, 3127, 6657, 9381, 16801, 18703, 21889, 50403, 56109, 65667, 117607, 130921, 352821, 392763, 991259, 2973777, 6938813, 20816439]

約数ペア:

[(1, 20816439), (3, 6938813), (7, 2973777), (21, 991259), (53, 392763), (59, 352821), (159, 130921), (177, 117607), (317, 65667), (371, 56109), (413, 50403), (951, 21889), (1113, 18703), (1239, 16801), (2219, 9381), (3127, 6657)]