21152187

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{431}}^1$

素因数の和:504

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16587333

約数列:

[1, 3, 7, 9, 19, 21, 41, 57, 63, 123, 133, 171, 287, 369, 399, 431, 779, 861, 1197, 1293, 2337, 2583, 3017, 3879, 5453, 7011, 8189, 9051, 16359, 17671, 24567, 27153, 49077, 53013, 57323, 73701, 123697, 159039, 171969, 335749, 371091, 515907, 1007247, 1113273, 2350243, 3021741, 7050729, 21152187]

約数ペア:

[(1, 21152187), (3, 7050729), (7, 3021741), (9, 2350243), (19, 1113273), (21, 1007247), (41, 515907), (57, 371091), (63, 335749), (123, 171969), (133, 159039), (171, 123697), (287, 73701), (369, 57323), (399, 53013), (431, 49077), (779, 27153), (861, 24567), (1197, 17671), (1293, 16359), (2337, 9051), (2583, 8189), (3017, 7011), (3879, 5453)]