21089848

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{821}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 45127800

約数和(自身を除く): 24037952

約数列:

[1, 2, 4, 8, 13, 19, 26, 38, 52, 76, 104, 152, 169, 247, 338, 494, 676, 821, 988, 1352, 1642, 1976, 3211, 3284, 6422, 6568, 10673, 12844, 15599, 21346, 25688, 31198, 42692, 62396, 85384, 124792, 138749, 202787, 277498, 405574, 554996, 811148, 1109992, 1622296, 2636231, 5272462, 10544924, 21089848]

約数ペア:

[(1, 21089848), (2, 10544924), (4, 5272462), (8, 2636231), (13, 1622296), (19, 1109992), (26, 811148), (38, 554996), (52, 405574), (76, 277498), (104, 202787), (152, 138749), (169, 124792), (247, 85384), (338, 62396), (494, 42692), (676, 31198), (821, 25688), (988, 21346), (1352, 15599), (1642, 12844), (1976, 10673), (3211, 6568), (3284, 6422)]