640171558

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{28933}}^1$

素因数の和:29008

約数の個数: 32

約数和(自身を含む): 1108287936

約数和(自身を除く): 468116378

約数列:

[1, 2, 13, 23, 26, 37, 46, 74, 299, 481, 598, 851, 962, 1702, 11063, 22126, 28933, 57866, 376129, 665459, 752258, 1070521, 1330918, 2141042, 8650967, 13916773, 17301934, 24621983, 27833546, 49243966, 320085779, 640171558]

約数ペア:

[(1, 640171558), (2, 320085779), (13, 49243966), (23, 27833546), (26, 24621983), (37, 17301934), (46, 13916773), (74, 8650967), (299, 2141042), (481, 1330918), (598, 1070521), (851, 752258), (962, 665459), (1702, 376129), (11063, 57866), (22126, 28933)]