28208925

素因数分解:

$3^3\times 5^2\times {\mathrm{23}}^2\times {\mathrm{79}}^1$

素因数の和:144

約数の個数: 72

約数和(自身を含む): 54857600

約数和(自身を除く): 26648675

約数列:

[1, 3, 5, 9, 15, 23, 25, 27, 45, 69, 75, 79, 115, 135, 207, 225, 237, 345, 395, 529, 575, 621, 675, 711, 1035, 1185, 1587, 1725, 1817, 1975, 2133, 2645, 3105, 3555, 4761, 5175, 5451, 5925, 7935, 9085, 10665, 13225, 14283, 15525, 16353, 17775, 23805, 27255, 39675, 41791, 45425, 49059, 53325, 71415, 81765, 119025, 125373, 136275, 208955, 245295, 357075, 376119, 408825, 626865, 1044775, 1128357, 1226475, 1880595, 3134325, 5641785, 9402975, 28208925]

約数ペア:

[(1, 28208925), (3, 9402975), (5, 5641785), (9, 3134325), (15, 1880595), (23, 1226475), (25, 1128357), (27, 1044775), (45, 626865), (69, 408825), (75, 376119), (79, 357075), (115, 245295), (135, 208955), (207, 136275), (225, 125373), (237, 119025), (345, 81765), (395, 71415), (529, 53325), (575, 49059), (621, 45425), (675, 41791), (711, 39675), (1035, 27255), (1185, 23805), (1587, 17775), (1725, 16353), (1817, 15525), (1975, 14283), (2133, 13225), (2645, 10665), (3105, 9085), (3555, 7935), (4761, 5925), (5175, 5451)]