280047760

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{257}}^2$

素因数の和:580

約数の個数: 60

約数和(自身を含む): 665987508

約数和(自身を除く): 385939748

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 212, 257, 265, 424, 514, 530, 848, 1028, 1060, 1285, 2056, 2120, 2570, 4112, 4240, 5140, 10280, 13621, 20560, 27242, 54484, 66049, 68105, 108968, 132098, 136210, 217936, 264196, 272420, 330245, 528392, 544840, 660490, 1056784, 1089680, 1320980, 2641960, 3500597, 5283920, 7001194, 14002388, 17502985, 28004776, 35005970, 56009552, 70011940, 140023880, 280047760]

約数ペア:

[(1, 280047760), (2, 140023880), (4, 70011940), (5, 56009552), (8, 35005970), (10, 28004776), (16, 17502985), (20, 14002388), (40, 7001194), (53, 5283920), (80, 3500597), (106, 2641960), (212, 1320980), (257, 1089680), (265, 1056784), (424, 660490), (514, 544840), (530, 528392), (848, 330245), (1028, 272420), (1060, 264196), (1285, 217936), (2056, 136210), (2120, 132098), (2570, 108968), (4112, 68105), (4240, 66049), (5140, 54484), (10280, 27242), (13621, 20560)]