20915802

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{443}}^1$

素因数の和:555

約数の個数: 48

約数和(自身を含む): 47238048

約数和(自身を除く): 26322246

約数列:

[1, 2, 3, 6, 9, 18, 43, 61, 86, 122, 129, 183, 258, 366, 387, 443, 549, 774, 886, 1098, 1329, 2623, 2658, 3987, 5246, 7869, 7974, 15738, 19049, 23607, 27023, 38098, 47214, 54046, 57147, 81069, 114294, 162138, 171441, 243207, 342882, 486414, 1161989, 2323978, 3485967, 6971934, 10457901, 20915802]

約数ペア:

[(1, 20915802), (2, 10457901), (3, 6971934), (6, 3485967), (9, 2323978), (18, 1161989), (43, 486414), (61, 342882), (86, 243207), (122, 171441), (129, 162138), (183, 114294), (258, 81069), (366, 57147), (387, 54046), (443, 47214), (549, 38098), (774, 27023), (886, 23607), (1098, 19049), (1329, 15738), (2623, 7974), (2658, 7869), (3987, 5246)]