21479120

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1087}}^1$

素因数の和:1132

約数の個数: 80

約数和(自身を含む): 56663040

約数和(自身を除く): 35183920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1087, 1235, 1520, 1976, 2174, 2470, 3952, 4348, 4940, 5435, 8696, 9880, 10870, 14131, 17392, 19760, 20653, 21740, 28262, 41306, 43480, 56524, 70655, 82612, 86960, 103265, 113048, 141310, 165224, 206530, 226096, 268489, 282620, 330448, 413060, 536978, 565240, 826120, 1073956, 1130480, 1342445, 1652240, 2147912, 2684890, 4295824, 5369780, 10739560, 21479120]

約数ペア:

[(1, 21479120), (2, 10739560), (4, 5369780), (5, 4295824), (8, 2684890), (10, 2147912), (13, 1652240), (16, 1342445), (19, 1130480), (20, 1073956), (26, 826120), (38, 565240), (40, 536978), (52, 413060), (65, 330448), (76, 282620), (80, 268489), (95, 226096), (104, 206530), (130, 165224), (152, 141310), (190, 113048), (208, 103265), (247, 86960), (260, 82612), (304, 70655), (380, 56524), (494, 43480), (520, 41306), (760, 28262), (988, 21740), (1040, 20653), (1087, 19760), (1235, 17392), (1520, 14131), (1976, 10870), (2174, 9880), (2470, 8696), (3952, 5435), (4348, 4940)]