20818590

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53381}}^1$

素因数の和:53404

約数の個数: 32

約数和(自身を含む): 53809056

約数和(自身を除く): 32990466

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 53381, 106762, 160143, 266905, 320286, 533810, 693953, 800715, 1387906, 1601430, 2081859, 3469765, 4163718, 6939530, 10409295, 20818590]

約数ペア:

[(1, 20818590), (2, 10409295), (3, 6939530), (5, 4163718), (6, 3469765), (10, 2081859), (13, 1601430), (15, 1387906), (26, 800715), (30, 693953), (39, 533810), (65, 320286), (78, 266905), (130, 160143), (195, 106762), (390, 53381)]