19878138

素因数分解:

$2^1\times 3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1997}}^1$

素因数の和:2091

約数の個数: 48

約数和(自身を含む): 49870080

約数和(自身を除く): 29991942

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 79, 126, 158, 237, 474, 553, 711, 1106, 1422, 1659, 1997, 3318, 3994, 4977, 5991, 9954, 11982, 13979, 17973, 27958, 35946, 41937, 83874, 125811, 157763, 251622, 315526, 473289, 946578, 1104341, 1419867, 2208682, 2839734, 3313023, 6626046, 9939069, 19878138]

約数ペア:

[(1, 19878138), (2, 9939069), (3, 6626046), (6, 3313023), (7, 2839734), (9, 2208682), (14, 1419867), (18, 1104341), (21, 946578), (42, 473289), (63, 315526), (79, 251622), (126, 157763), (158, 125811), (237, 83874), (474, 41937), (553, 35946), (711, 27958), (1106, 17973), (1422, 13979), (1659, 11982), (1997, 9954), (3318, 5991), (3994, 4977)]