21872781

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{6091}}^1$

素因数の和:6126

約数の個数: 32

約数和(自身を含む): 38988800

約数和(自身を除く): 17116019

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 6091, 18273, 42637, 54819, 115729, 127911, 164457, 347187, 383733, 810103, 1041561, 1151199, 2430309, 3124683, 7290927, 21872781]

約数ペア:

[(1, 21872781), (3, 7290927), (7, 3124683), (9, 2430309), (19, 1151199), (21, 1041561), (27, 810103), (57, 383733), (63, 347187), (133, 164457), (171, 127911), (189, 115729), (399, 54819), (513, 42637), (1197, 18273), (3591, 6091)]