19877320

素因数分解:

$2^3\times 5^1\times {\mathrm{653}}^1\times {\mathrm{761}}^1$

素因数の和:1425

約数の個数: 32

約数和(自身を含む): 44851320

約数和(自身を除く): 24974000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 653, 761, 1306, 1522, 2612, 3044, 3265, 3805, 5224, 6088, 6530, 7610, 13060, 15220, 26120, 30440, 496933, 993866, 1987732, 2484665, 3975464, 4969330, 9938660, 19877320]

約数ペア:

[(1, 19877320), (2, 9938660), (4, 4969330), (5, 3975464), (8, 2484665), (10, 1987732), (20, 993866), (40, 496933), (653, 30440), (761, 26120), (1306, 15220), (1522, 13060), (2612, 7610), (3044, 6530), (3265, 6088), (3805, 5224)]