640676778

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{113}}^1\times {\mathrm{2213}}^1$

素因数の和:2399

約数の個数: 64

約数和(自身を含む): 1502260992

約数和(自身を除く): 861584214

約数列:

[1, 2, 3, 6, 7, 14, 21, 42, 61, 113, 122, 183, 226, 339, 366, 427, 678, 791, 854, 1281, 1582, 2213, 2373, 2562, 4426, 4746, 6639, 6893, 13278, 13786, 15491, 20679, 30982, 41358, 46473, 48251, 92946, 96502, 134993, 144753, 250069, 269986, 289506, 404979, 500138, 750207, 809958, 944951, 1500414, 1750483, 1889902, 2834853, 3500966, 5251449, 5669706, 10502898, 15254209, 30508418, 45762627, 91525254, 106779463, 213558926, 320338389, 640676778]

約数ペア:

[(1, 640676778), (2, 320338389), (3, 213558926), (6, 106779463), (7, 91525254), (14, 45762627), (21, 30508418), (42, 15254209), (61, 10502898), (113, 5669706), (122, 5251449), (183, 3500966), (226, 2834853), (339, 1889902), (366, 1750483), (427, 1500414), (678, 944951), (791, 809958), (854, 750207), (1281, 500138), (1582, 404979), (2213, 289506), (2373, 269986), (2562, 250069), (4426, 144753), (4746, 134993), (6639, 96502), (6893, 92946), (13278, 48251), (13786, 46473), (15491, 41358), (20679, 30982)]