21216390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54401}}^1$

素因数の和:54424

約数の個数: 32

約数和(自身を含む): 54837216

約数和(自身を除く): 33620826

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390, 54401, 108802, 163203, 272005, 326406, 544010, 707213, 816015, 1414426, 1632030, 2121639, 3536065, 4243278, 7072130, 10608195, 21216390]

約数ペア:

[(1, 21216390), (2, 10608195), (3, 7072130), (5, 4243278), (6, 3536065), (10, 2121639), (13, 1632030), (15, 1414426), (26, 816015), (30, 707213), (39, 544010), (65, 326406), (78, 272005), (130, 163203), (195, 108802), (390, 54401)]