21720972

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19891}}^1$

素因数の和:19918

約数の個数: 48

約数和(自身を含む): 62381312

約数和(自身を除く): 40660340

約数列:

[1, 2, 3, 4, 6, 7, 12, 13, 14, 21, 26, 28, 39, 42, 52, 78, 84, 91, 156, 182, 273, 364, 546, 1092, 19891, 39782, 59673, 79564, 119346, 139237, 238692, 258583, 278474, 417711, 517166, 556948, 775749, 835422, 1034332, 1551498, 1670844, 1810081, 3102996, 3620162, 5430243, 7240324, 10860486, 21720972]

約数ペア:

[(1, 21720972), (2, 10860486), (3, 7240324), (4, 5430243), (6, 3620162), (7, 3102996), (12, 1810081), (13, 1670844), (14, 1551498), (21, 1034332), (26, 835422), (28, 775749), (39, 556948), (42, 517166), (52, 417711), (78, 278474), (84, 258583), (91, 238692), (156, 139237), (182, 119346), (273, 79564), (364, 59673), (546, 39782), (1092, 19891)]