21666897

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{787}}^1$

素因数の和:842

約数の個数: 48

約数和(自身を含む): 39336960

約数和(自身を除く): 17670063

約数列:

[1, 3, 7, 9, 19, 21, 23, 57, 63, 69, 133, 161, 171, 207, 399, 437, 483, 787, 1197, 1311, 1449, 2361, 3059, 3933, 5509, 7083, 9177, 14953, 16527, 18101, 27531, 44859, 49581, 54303, 104671, 126707, 134577, 162909, 314013, 343919, 380121, 942039, 1031757, 1140363, 2407433, 3095271, 7222299, 21666897]

約数ペア:

[(1, 21666897), (3, 7222299), (7, 3095271), (9, 2407433), (19, 1140363), (21, 1031757), (23, 942039), (57, 380121), (63, 343919), (69, 314013), (133, 162909), (161, 134577), (171, 126707), (207, 104671), (399, 54303), (437, 49581), (483, 44859), (787, 27531), (1197, 18101), (1311, 16527), (1449, 14953), (2361, 9177), (3059, 7083), (3933, 5509)]